Gah, finally!
I meant to write about this ages ago, but now that Version 1.1 is out thanks to Thomas Oldervoll, I can happily report that I have Google Calendar working on my Blackberry 8700c!
For awhile I was using 30Boxes Mobile as my Gcal proxy, but no longer! I can unhide that Calendar app on my Blackberry desktop now that I’ve got the open-source Gcalsync running!
Cut-to-the-chase instructions: load up wap.gcalsync.com on your Blackberry and install the signed version. Run the app. Choose Sync, type in your Google username and password (no idea how trustworthy this thing is) and hit Save. The Sync should commence.
Now, I had some issues with this, but it’s better than nothing, so I can only hope that Thomas will continue his work (or you’ll pitch in).
And hey, if it works for you, digg it.
Factory Joe 
Nice.. Any idea on how much traffic it produces on someone’s blackberry (since in Germany we don’t have affordable unlimited data plans – for whichever reason)?
I tried it out and can’t seem to get it working. I hope you’re having better luck with it.
For specific platforms, there’s an alternative solution: http://www.saraiya.com
I have a 7250 and the downlooad of the blackerry version opening error says I must have a RIM Runtime Code.. The signed version just fails. any thoughts?
Yeah, I’m still having trouble getting it to work. Try posting to the <a href="http://groups-beta.google.com/group/gcalsync/Google Group.
No Luck this evening to my BB 8800. I followed several peoples’ instructions but no luck. IN THE NAME OF ALL THINGS TECHNO! GOOGLE! PLEASE GET THIS WORKING FOR US SOON!!!!
I’m verry pleased with Google calendar sync for blackberry