If you read the CM6 Nightly thread on XDA, there is a fix for FB sync...
Code:
adb remount
adb shell sed -i 's/ro.product.name=htc_supersonic/ro.product.name=opal/g' /system/build.prop
adb shell sed -i 's/ro.product.device=supersonic/ro.product.device=sapphire/g' /system/build.prop
adb shell rm /system/app/Facebook.apk
adb reboot
Then reinstall FB from the Market.
Here is the thread... on the OP there are links to the common fixes.
http://forum.xda-developers.com/showthread.php?t=729367
If you can't find something because the thread is huge... there is that whole search thing.
enjoy!
there is also an app called syncmypix <-spelled like that... that will sync your FB pictures.