Apparently, the company folded last week and a couple of ex-employees have started a user help group at
http://www.geocities.com/thedigitalwallet/
You have to sign up at Yahoo, so use an addy you don't mind getting spammed on.
I have one of the 6GB Wallets and was looking for new firmware, which by the way is on the new site.
It's a shame, another case of a tech product outliving the company.
Zack