Is the iPhone battery replaceable?

- Yes. Apple has an official out-of-warranty battery replacement program for $79 + $6.95 shipping.

Is the iPhone battery user-replaceable?

- the iPhone is sealed and is not "user-servicable", making iPhone similar to iPod in this respect. Battery replacement will be available through Apple, and third party and do-it-yourself battery replacements for iPhone will also be available.

What kind of battery does the iPhone use?

- The iPhone uses a 3.7V Lithium Ion Polymer battery, as do nearly all mobile phones and portable devices.

Can I use my iPod external battery pack, power adapter, charger, or other power accessory with iPhone?

- Yes! the iPhone also uses the same 30-pin dock connector as iPod, and a wide range of external battery packs, power adapters, wall chargers, vehicle chargers, USB and FIreWire charging cables, and many other Apple and third party power accessories for iPod are already compatible with iPhone.

Other language options?

- No. I would imagine they will on the international versions.

Startup time?

- About 14 seconds

Screen seem scratchable?

- Not unless you grind it into gravel. It does smudge a lot

Speaker quality?

- Kind of soft. Have to turn up volume
- Speaker quality is good, but can be "overdriven", but it's very cool to play iTunes outloud on the phone!

Background noise with headphones/mic?

- Similar to iPod

How easy is it to set up mail, contacts etc. Not to be smart, but how easy was it to set up your music on your iPod?

-It imports everything for you. No more spending an hour retyping your contacts into your tiny phone

Does it support foreign language SMS, email and webpage?

- Only if the characters fit English style...like German. Chinese, Arabic, Russian, etc not supported. No special/accented characters.
- Keyboard is English only; there are some currency symbols only

What happens if you turn it 180, so it's upside down, does the screen turn all the way round with it? If you "roll" the phone around the X axis, how does the transition effect work in that scenario? Does it jus "snap to" the correct orientation, or do they have the graphical transition set up to follow correctly and 3D turning, rotating twitting action?

-In landscape mode you can rotate 180° and the iPhone will animate to right the image.
-In portrait mode the Home button has to be on the bottom.
-It will properly rotate the image when flipped 180 on the x axis.So someone facing you can see it. No matter what direction you turn it, the web page will rotate toward the home button. So no viewing it upside down.
-If you rotate the iPhone 180 degrees, it knows it and flips over in one motion to re-orient. However, some apps won't re-orient (YouTube won't), so those can be viewed upside down. Safari won't let you.

What happens with GMail? Do you have to go through the web browser or does it integrate properly into the email client?

-gmail allows the use of pop3 so any email client capable of this functionality will be gmail compatible, including the iphone.
-GMail works both as a web app, and setup as a POP account
-Read/Unread in EMail syncs automatically if you're using IMAP, doesn't sync if you're using POP (as the protocols work)

How does Mail handle Rules and Mailboxes? Does it port your existing rules and mailboxes over from Mail.app? If not, is there a way to establish rules and mailboxes on the iPhone itself?

-There is NO push email. All email accounts are sync'd automatically from your Mail.app setups and they work flawlessly (you can also manually create additional accounts). However, these are checked manually, or on a schedule.
-There are no rules - you can't do any filtration. You also dont have the ability to create your own folders.
-The Mail app needs some enhancements. Its really really simple. It doesn't even let you set custom ports for accounts - so if your POP interface is running on a non standard port

What would happen if I put a prepaid ATT SIm card in the phone? I suppose it would still work because it recognizes still being on ATT?

-They don't.

How does it (not) handle Flash?

-Absolutely no Flash

Can you record phone conversations?

-Cannot record phone conversations

Sync over internet via Mac?

- Syncing is flawless, but the initial sync is painfully slow. Go have dinner. It syncs all your email accounts out of Mail.app, so everything is automatically setup and working. It also syncs all your Safari bookmarks into Safari on the phone (so clean them up!)

Does the iPhone's Bluetooth support A2DP? - for stereo bluetooth headphones?

- No Stereo Bluetooth

Does the iPhone offer compatibility with Nike + iPod?

- Nike+iPod: "This accessory is not supported by iPhone."

What attachments can mail display? Can it read/display PDF documents?

- Mail displays: PDF, Word, Images

Can it Print?

- No Terminal, no SSH, no Printing