I would like to get synched back up with whatever is the current maintenance release - do I need to apply all 1.6.1 maintenance dlls?
No. I would load the 1.6.5 beta (we will be finalizing it this week and you can update gain then). This will be the fastest and easiest way to get you "synced" back up. You can get it here: http://forum.strataframe.net/FindPost14525.aspx .
What happened to 1.6.2 release?
Really we just turned it into the 1.6.5. We made so many changes, including everything that would have been 1.6.2, into this build. So instead of a smaller point release, this turned into a really big release with a lot of fixes and enhancements.