To get to your point directly: TealPaint is now in Beta 6.38 and they've added tons of stuff over the LAST 2 months; I'll mention the airbrush thing on their forum (if you sign up for a yahoo account you can post too . . . multiple requests go a long way!)
I'll be talking to Tealpoint later today regarding TealMover -- 1.93 was solid, they've added a lot to it and now it's "glitching" and I'm upset -- that was my first Teal app. They trying to build in too much, if you ask me - the whole idea of TealMover is that it "move," and twice it's glitched on moving something to the SD Card and mis-stating it's in "ROM." 1.93 didn't do that.
I haven't found anything as good as TealPaint but then all I'm really interested in is ability to sketch detailed maps, export images to the desktop, and do screen-grabs (also for export). I've got a "forced day off" today, so I'll do some checking for you; I'll be "surfing Palm stuff" anyway. I'll PM you if I find anything.
In the meantime, it's easier to get an improvement out of TealPoint than to find everything from scratch; think about emailing or "entering their forum" and requesting what you need SPECIFICALLY - they really are great at listening and performing. Now would be perfect, because the new beta hasn't become "final."