Is there any way to ask to be notified when a site goes live without actually comitting to participate in it? I need this because (a) I might not be up to participating in all the sites I'd like to, and (b) you can commit to a maximum of three sites.
Once a site goes to the commitment stage, that becomes the default tab. The definition tag is still available, however. (See http://area51.stackexchange.com/proposals/1369?phase=definition for instance.) That tab has a separate "Follow" button.