I'm new to Area51. I found on virtually the first page 3 topics that I'm interested in and want to participate in, so I commited to them ... and then I went to some more pages and found more topics ... and get told I cannot support these topics because of some arbitrary limit of three commitments.
Please remove this limit and let the actual participation decide the issue.
(Why not just put the sites up, monitor their performance periodically, and after some cut-off period decide their fate)
Mark Robinson asked the same question previously - more pertinent answers there.