Here is a good site for the Archos, although it seems to be down right now.

http://forum.archosfans.com/

Lots of good general info as well as a forum dedicated to hacking the 605wifi.

I agree with others that the archos is great for video and audio and even web browsing, but the web plug-in costs extra. However, the Nokia tablets are much more versatile and I use my n810 way more than i use the 605.

just my $.02