Previously I had published a link to my favourite SQL Server version site but it seems the boys at SQL Team no longer have the latest and greatest link.
Check out this link that provides a nice pivot table view of all the latest service packs for each edition of SQL Server. The page includes a detailed view of the cumulative updates for each major edition. If you click on each service pack edition, and you will go straight to the official Microsoft page where you can find out more detailed information about the relevant KB for the release.
There is also a blow by blow list of updates in chronological order you can check regularly if you get bored of news.com.
Happy patching !