Well, I'm going to be a naysayer. Most of the sketches we see are posted as adjuncts to obs reports and belong there. If you're sketching as an artform, post it in the imaging sections. That's where they have appeared in the past.
I'm against the on-going splintering of the forum. The 'beginners' sections drive me mad, duplicating other sections of the forum on an arbitrary and ill-defined basis, to the point where I don't bother going there any more. The major prob with these sections is that they drive a wedge between sections of the astro community, and require participants to make a ridiculous judgement as to when they are no longer a 'newbie' (another term that drives me absolutely troppo!). Would there be a beginners sketching sub-sub-forum for those starting out?
Keep it simple - just my opinions.
Cheers -