I am running Diablo on my n810 and yes, syncevolution 0.8-1a works just fine.

So far I have tested it with Pimlico Contacts and Dates. It has support for memo and to-do as well, but I haven't tried that.

It takes a little futzing to get it to work with multiple calendars (I believe its a SyncML limitation more than a syncevolution one) as you have to set up two configs and mod one to point to the other calendar (its easy enough).

Given the release history of 6 months between .7 and .8-1a, you might be waiting a while for a final release, but it seems stable enough for me. It hasn't crashed yet and the new configuration handler allows you to override and input any of the parameters from the command line in case you need to do something not normal for your sync.

So far I have had no issues with it, other than taking a while to figure out how to sync multiple calendars to multiple calendars in Dates.

BTW, I still have GPE, but If the pimlico stuff is working nice then I'll probably switch because it has a nicer UI. However, it has no Home screen applet which is sort of a need for me.