I tried OS2007on770; although I didnt run any of the application you mention, I can give you my experiences as follows:
First I was really impressed; OS2007 is better than OS2006, and - all in all - it runs fine.

There are some drawbacks, though, that made me re-flash with OS2006:

• The device reboots very often, especially when brwosing with opera
• Video playback has rough edges, you get unexpected results when pausing or switching to/from fullscreen mode
• I wasnt able to make voice calls to N800-users (which works in OS2006)
• You have to manually change the configuration in order to get internet radio working

Especially the reboots were very annoying and finally made me revert to OS2006. I still believe that the Hacker Edition has great potential and I will sure try the next release.