2007HE is quite solid on my 770. I've recently disabled the automatic rss update - and this has brought the stability close to a 100%. I seldom have to reset (in the last week the 770 has rebooted by itself once).
My daily "routines" are claws mail (imap), microB enabled browsing and vnc.

The only problem I have with HE2007 is that scrolling in websites is screwed. It seems that the up down buttons respond to input boxes, even when I use continued press - so instead of scrolling, it jumps to next/previous input box, and then starts scrolling. This makes scrolling with the buttons unusable. Not sure if I'm the only one with that problem...