here's a review i wrote on another board:
here's some background before i get into replying to your post. i'm a phone geek through and through. i usually changed phones every 3-6 mo's. even phones from abroad i'd seek- back when the motorola a1000 (or was it the a1200?) wasn't availible here, i stilll went out and got one- paid an arm and a leg!. this was the case up until i got the apple 2g iphone. I used that for over a year and a half- even when the 3g came out, i kept my 2g. it did everything i wanted well/quickly.
about 2 weeks ago, some friends kept telling me to switch to bb, just to get bbm and chat with them during the day. i went into the store without much research (i'm currently located in hong kong) and the deal was 1k mins/ultd data/free bold for around 50usd a mo (2yr contract). sold-AH!
the iphone just did everything quickly/well...no need to go into multiple menus to do something- just hit home button and hit new program. very easy to navigate. It also has the best email viewing and internet viewing bar-none. 'it just works'! also- the music player is great, afterall, it is an ipod.
i've had the bb for 2 weeks- the os doesn't seem as stable, it has a million options most of which i won't use, the battery is on par with the iphone. but- i find myself actually wanting to write emails! i'm always connected through bbm/msn/gchat etc...and obviously the fbook client is always updating. take away the connectivity of these, and i'd probably want to go back to the iphone, but since it has all of these, and i'm always on the move, it's good for me to keep in touch with friends (esp. since i have friends both here and back home in the states)
so- that's my mini review- i'd say it's a toss up between the two- the bold has def. brought bb on the iphone's playing field- so much so that an iphone lover like myself has moved over to bb!