I think this site will be a bit more active than Buildism.

[Ghosty]

http://2dworlds.org/forum/online.php?action=today

Ghosty 11:01 PM
Invader 11:01 PM
BuildistGuard 10:42 PM
Jacob_ 10:30 PM
Myem 09:52 PM
Swag 09:50 PM
Leonartist 09:37 PM
Garyw1 09:30 PM
Void 08:59 PM
Glome 08:58 PM
almopopmz7 08:31 PM
Pro 05:45 PM
handmarvin 05:35 PM
DysLabs 04:59 PM
Kieron 04:16 PM
Density 03:49 PM
kingcreatorlabs 03:45 PM
Land 02:53 PM
Justcola 02:23 PM
Emperor 02:21 PM
noob007 02:53 AM
Innerwebs 02:36 AM

You can exclude Justcola, kingcreatorlabs, and almopopmz7 for now because they only just signed up today. Everyone else is a returning member.