After ROM upgrade and adding certain programs had a problem where Activesync would not work with desktop (activesync code:85020006 reported on desktop). Got this working by going into desktop Activesync 4.5 (click on File, Connection Settings) and setting "This computer is connected to:" The Internet (thanks to eskasi at
http://forum.xda-developers.com/showthread.php?t=299558 ).
For Internet Sharing was able to get that working (was timing out/not connecting and saying "Limited or no connectivity") by stopping bluetooth on the PPC (thanks to Sleuth255 at
http://forum.xda-developers.com/showthread.php?t=296829 ).
Funny thing is I did not have these problems with the first iteration of adding programs after the ROM upgrade - everything worked OK until adding Opera Mobile beta 8.65b (so I was not surprised PPC hung - screen went blank after heavy usage of Opera and PPC-6700 was Frozen, has to soft reset). After hard reset and backing off to Opera 8.60 public release all was OK, but then had this connecticity problem described above.
Great job Helmi - I suspect there are MS bugs as you would expect, maybe the BT stack used is the problem for Internet Sharing (sounds strange), but suspect a MS bug in ActiveSync with WM6/AS 4.5. I will see if this is a keeper. Kirvin put out a great WM5 AKU 3.5 which seemed cleaner and faster but I'm sure Helmi got the ball rolling for WM6 nicely.