Gosh, not the most active Archos forum
Perhaps things will pick up now that the 105 is available for ┬ú19.97 here in the UK at Currys (both in store and online).
I bought a 105 today as a more pocketable MP3 solution than my 605. Initial impressions are that it is a nicely designed and built unit with good sound quality (particularly with better 'phones, eg Creative EP630).
Updating the firmware to the latest version (1.6.07) gives a more 605-like appearance to the user interface within the limits of the 105's screen resolution.
All I need now is a decent case for it (I know Archos do one, but with the postage it's almost as expensive as the player itself!).