> Aren't they the guys who had that licensing/trademark dispute
> with MySQL AB ?
Yep, they have had licensing dispute with AB, mostly because of
NuSphere transactional engine (the first one for MySQL) named Gemini.
Finally, they achieved a settlement and no further problems happened
since 2001.
Regarding PostgreSQL (the ancestor for UltraSQL), it is not GPLed and
therefore, there is no licensing problems at all.
JV.