I have the i465. After spending some research time online, I have installed opera mini, googlemaps, and gmail. This combination has given access to email, websites, and the Internet. While the i465 is no iphone, it gets the job done and really, for $50/month, I don't think you can beat it. If you do, let me know.
I read many reviews before diving into the i465. I've heard the issues around delayed messages, low quality camera, tiny keyboard, etc..
So far, I'm receiving messages quickly and gmail is working pretty fast too. The camera is just for kicks, and the pyramid keyboard feels a little lager than it looks.
I've also used bluetooth to access the Internet from my laptop when I couldn't find a open wifi signal. While I would not advise this as a primary connection, as it just slightly faster than dial up, the connection works well for POP access.
So if you're looking for a economical solution to talking, texting, and Internet access; consider the i465. If you want a mini computer (read:iphone), buy one, sign-up for a 2year contract, and pay the monthly fees.