Hmm, I always like picking names (I'm a musician, so it's fun choosing album names or group names).
SQLNotes is so much more than an outliner. It's also a database, notetaker, webclipper (potentially), scheduler, calendar, mindmapper (potentially). It's a PIM, but very different and more flexible than other PIM's out there. I think the name should reflect that somewhat.
Don't use Tao, there is already a TaoNotes out there and it's a funky program. How about these suggestions:
PIMP (sorry couldn't resist)
MindPad (I like this one)
Outline Commander (I like this also)