(thread here in the aftermarket software forum) has a current "Lite" release that syncs sent mail, draft mail, Outlook contacts and notes. They are finishing up their full release which will include Calendar and Tasks.
This page in the thread has the announcement of the Lite version and links/info. OTA Full Outlook Sync Needs Beta Testers - BIS Users
There is another similar service also recently launched...similar goals, probably not as mature overall, and a bit less secure (your data is stored on a web server, rather than held only for syncing and then removed). May or may not matter to you. Full OTA Sync Email Service