There's a vocal group of Visual Studio 2005 beta testers who are advocating for Microsoft to release an unplanned-for third beta release of "Whidbey" before it's set to be unveiled on November 7. And there are other testers advocating for Microsoft to continue to add new features right up until the drop-dead cut-off date, even without a third beta. Microsoft is planning to add one such late-breaking feature, System.Nullable data types, to the August Community Technology Preview (CTP) build, which is due out real soon now.