The GUI should be easy to achieve once the namecoin support is patched on top of the latest bitcoind, but that does mean some hacking still.
I really think it is best to have this work split in two:
1) patching latest bitcoind to support namecoin
2) tweaking the GUI to support namecoin specific functions
I have pledged 1000 NMC to 1)
lunarboy (100) and marcus_of_augustus (1000) pledged 1100 NMC to 2)
the GUI can be achieved without 1), but I am certainly not interested in that as what I need is the server support.
Is there anyone willing to take this task? Any more pledges? Someone (trusted) to take the funds pledged and deliver to bounty taker after completion?