I've just started using OmniFocus, and so far I have found it to be absolutely wonderful!

One thing that would be really helpful would be the ability to sync to any read/write calendar in iCal instead of only the local ones.

I realize that this is complicated by the fact that only the local calendars likely have sync interfaces. Luckily, CalDAV is (relatively) straightforward to implement... The basic ability to associate a context with a specific CalDAV calendar would be extraordinarily helpful, because then I could easily set up a shared context with my fiancee.

T'would be great if the whole omnifocus database could be stored via CalDAV, but something in my gut tells me that even if that were possible that iCal would likely butcher it.