I don't know if anyone saw this, so wanted to be sure to reply.
It's a nice idea, though my Artist-Who-Is_Overprotective instincts worries about copyright. That is, people on the internet have been known to acquire other people's work and call it their own in portfolios, resumes, and reproductions. If anyone posts in a gallery like that, I guess it would be with a warning or something. Watermark software is either too hard to figure out or too expensive.
I'd like to see MM's daughter's drawings in one place.