I have th QPE alarm clock working on my 6K. Only oddity with it is that the alarm seems to only work when the "Display with magnified screen" ckeckbox is empty.
I was able to install prboom and get it to start, but I never got any of the controls to work... would get sound and display but then it wouldn't react to any keys, and I had to do a reset to get out of it. I'm still trying to get it to work though. I have also installed znester, but haven't tried it out on any games (I still don't have any CF or SD storage so I'm just going off system flash.
As for the memory, I think the 6k has 64mg NAND so battery loss doesn't matter. But thats just my understanding of it. I'm kinda new to the Z scene and am still learning.
I do have Kismet working fine. I followed the steps in the How-To section. There are steps specific to the sl-6000... mabye that would work for your c860??
I use stupkid's feed at
http://www.bryandeluca.com/feed for ipks and haven't had trouble with any of them so far. Thanks stupkid!
I can sync to Outlook 2003, but I usually use qtopiadesktop.