I'm thinking of going for the galaxy S (love my Blackberry but the Torch isn't a huge upgrade to my Bold so I would hold onto my bold). I have a few questions though:
"Durability - if I drop the galaxy will it be destroyed?"
Probably not unless it's a bad impact. See this durability test:
http://www.youtube.com/watch?v=3by5u9ax2EU
"Screen - how easy is it to scratch the screen? Do you need screen protectors?"
Very difficult. See the video above.
"I usually get a silicone case but considering the size of this phone it might become to large, any opinions?"
The phone is pretty thin. Mine is 'naked' and slides nicely into my pocket. Shouldn't be too bad with a case.
"I've read about an android 3.0 if samsung don't release an official update can you still get the update for the phone? And will doing that void the warranty?"
They have promised Android 2.2. We can only hope for 3.0 but it seems likely, as for an unofficial update I don't know. Samsung have released source code for the phone but I don't know if that includes everything needed to make an unofficial Android upgrade.
I suppose an unofficial upgrade voids the warranty but you can easily flash the official firmware back on.
"How good is the office software and is there support for odf (openoffice, since android is based on linux)."
Android may be based on Linux but you can't just install Linux apps on it. Apps need to be made specifically for Android.
The Galaxy S comes with ThinkFree Office pre-installed. Seems good, although when I opened a Word doc I couldn't see where the page breaks were. Doubt it's as fully featured as OpenOffice.
There are some other Android office programs out there that I haven't tried.
"Data - how much data do most android users use in a month (ie. What data package would I have to get to take advantage of most of the features)?"
I don't use a data package at the moment, I use my WiFi at home to do downloading and browsing when I'm not at the PC. The rest of the time I turn off synching and only use data for IM and Facebook.
I suppose I'll buy data bundles. If you want to do a lot of browsing away from home maybe 300MB per month would be ok. Adjust the data bundles you buy based on the usage you go through, it's hard to say exactly how much you'll need because it varies from person to person.
"Lastly typing, how fast can you type on android (or with the swype). I often use my phone for writing ideas so I do a lot of typing."
Can't give an accurate figure. Most of the time I use the standard Samsung keyboard and I'd say my typing speeds are decent now that I'm used to it.
You can potentially be very fast with Swype but that takes practice. Also if your hand happens to be a bit sticky/sweaty at the time then your finger wont slide smoothy making it a bit awkward to use, when that happens I just switch back to the standard keyboard.