I've noticed that as of late there have been no nightly builds on the Flex 3 or 4 SDK. This is odd to me, simply because these used to get published on a relatively regular basis. However, there hasn't been a nightly build of the Flex 4 SDK since May 12, 2010, which was before the latest milestone release. Does this mean there's not much active development happening around the SDKs at the moment? Looking at the SVN, it seems there has been some work being done, and it would be nice to see nightly builds again.