Cloudmark engine added to SP2 for 9.0 Antigen
https://support.microsoft.com/kb/971063
This should be a much better engine choice. In the coming weeks I will be sharing any experiences we have with this engine.
One suggestion:
If you switch over to the Cloudmark engine you need to disable the Starengine service and disable updates for Spamcure. (I would then delete the Spamcure engine folder)
Spamcure will spool up its service on an update. Since this is not being used, you end up wasting 350-500MB of physical ram.