I'll second Akira's take on the PSP. I've had one since the Japanese laucnh and while it's an awesome unit for gaming, browsing without a touchscreen on a handheld device sucks. Obviously, an on-screen keyboard is nothing compared to a physical keyboard, but it's much better than the current text input solution on the PSP.

Beyond that, I like the resolution better on the 770 for browsing. 480 on the PSP is cetainly better than many PDAs at 320, but 800 on the 770 is even better than VGA PDAs at 640. This really should limit the amount of horizontal scrolling on most web pages which should translate into a more natural desktop/laptop browsing feel.

As Akira pointed out, there are lots of unknowns. We need to see final production models operating to make true judgement calls on the 770. It has promise, but questions like real-world battery life, page loading times, WiFi range, MSRP, etc will ultimately decide its fate. However, I can say from current experience with the PSP that it's not an adequate browsing solution.

Jeff