In case you have been considering updating Desktop Manager on your PC to v7.0 I highly recommend holding off for now. We have been hearing reports of multiple problems with Sync and connections working on the new version. Users who have been calling RIM support have been told to wait a few days for the fix and @Bla1ze has confirmed as much on CrackBerry. If you have upgraded to v7.0 and are having issues you can downgrade by downloading the older version from carrier sites like T-Mobile here.
Let us know what you have been experiencing!