Nice idea, could also include a brief reason as to why its released. So to take your example of v6.12, it could say 'Bug Fix: Major crash exploit in versions 6.0 through 6.11' and a rating of how important it is to upgrade, as its a major bug in old versions the rating would be 'High priority', if its just a few new features, it would be 'low prioirity'. This way, you can decide if you really need to upgrade to it or if you can stick with the version you like.
Could also include a 'remember' option, so if you've already seen theres a new version, you don't get told about it for another 2 weeks or some period, that way you can still keep a check on new releases without being bugged by a popup or whatever each time you open mirc/connect to a server.
