If your primary interest is having internet access, a full keyboard, small size, adequate ram, cheap memory (SD), a fuller featured browser (free opera mini mobile, or the included browser) consider this:
http://www.usatoday.com/tech/columni...reo-700p_x.htm
New 700p Treo takes smartphones even higher
Updated 5/24/2006 9:27 PM ET
I've used an earlier version for 2 years, and I wouldn't want to live without it, but I don't use it for games...
sprint offers the lowest monthly rate and fastest internet speeds on the widest network....there are cheaper ways to purchase one.....promotions from sprint or third parties, or....on ebay, where I got mine. Just ask the seller, before you bid, for the "ein", call sprint, verify that the number, unique to each phone, is legitimate....not stolen or on an account with overdue charges. Bid on it, get it, it is insurable by sprint's insurance/guarantee plan, because it can only be used on sprint's network. Cingular and verizon charge much more than sprint for monthly unlimited data subscriptions.
I posted this because I read downsides about PSP's posted by others....bulky size, lack of a full keyboard, expensive memory "sticks", ram limitations and poor browsers, and limitations of wifi availability. The treo is the closest thing that I've found to an "all in one", small sized, superior functioned, communication and internet device, with unlimited data download at a reasonable price.