Just upgraded,
I had put my DG834GT back to the official Netgear F/W. From this I was able to upgrade to the 1007 DGTeam firmware through the web interface without bricking the router. However as DGTeam don't advise this method I would suggest not to risk it.
Everything seems to be working fine over here all the new features are a "tweakers" paradise.
One issue thats come up and I wonder if anyone else has it or has noticed it is that routerstats is reporting the same value for SF and SF Errors.
Only a small point.
Cheers
Mark