I did get a licence for PakB3D but I ended up not using it because:
A) It is DLL based, and if the DLL ever stopped working then I would have no way to fix it, and I doubt he would issue updates.
B) There didn't seem to be a seperate encryption key per user. For example I was talking to someone (might even have been t3K|Mac) who bought it as well and we both didn't have any seperate encryption key or string to encrypt it. Unless the DLL is generated on a per user bases with a different encryption code. Otherwise anyone with PackB3D can get at your files, and now you know at least 2 people who have it :).
C) It only seemed to let you pack up certain file types and have them recognised when its unpacking time. All the standard ones you would use for blitzz were there, but I needed SWF. I could be wrong about this though, but the other 2 reasons stopped me from putting time into looking properly.
PureBasic has inbuild packing tools and you could make your own dll with it to interface with b3d to take advantage of the tools. It would obviously be DLL based, but at least you would control the dll. Might be worth a look?
http://www.purebasic.com/documentation/packer/packmemory.html