[quote name='ITDEFX']Here is another question for ya... say you root your phone during the first week and then you have problems (like my problems) and you take it back to the store, can they actually tell if you rooted your phone and disqualify you from a replacement?[/QUOTE]
Yes, you'd want to flash a stock rom beforehand. Also, you can transfer the .apk files (apps) from your PC to your phone to install, but you'd have to somehow get the actual file. The only other way is to go to android.com and use the web market interface, but your phone still needs some kind of data connection, even if it's just wifi, because the site will just send it to your phone.