I cannot disagree with Morbus any more vehemently. I've been trying to get some kind of version identification feature for modules for over 2 years. I waste way the hell too much time trying to remember wtf version of a site and contrib modules I'm running on a site that I administer from time to time. Having it all listed on the modules page is fantastic and will save me lots of time and headaches in the future. (And yes, we need contrib modules to have version numbers.)
I think Morbus got this one, having not quite understood it at first, and is basically on board with it, except perhaps for the default versioning of core modules.
I'm fine with the core modules being Drupal release ver. -- Morbus Iff ( god less america ) Technical: http://www.oreillynet.com/pub/au/779 Culture: http://www.disobey.com/ and http://www.gamegrene.com/ icq: 2927491 / aim: akaMorbus / yahoo: morbus_iff / jabber.org: morbus