Ashley I think it would be beneficial to C2 to have some kind of site to show other applications made with system. The Scirra Arcade is more/or less just to promote games and IMHO C2 can be used to do a lot more.
For an example I thought about making gui-RPN calculator. It's a good way to snow how much development system can do for you.
Otoh.. I seriously doubt C2 can beat Rebol on that particular example. <img src="smileys/smiley2.gif" border="0" align="middle" />