Today Apple released Snow Leopard developer seed 10A394 through the Software Update system. This is the first Snow Leopard seed to be released in an “update” form through Software Update rather than as a complete separate build from the Apple Developer Connection website.

The download weighs in at 655MB, and requires that build 10A380 already be installed. Apple claims the new build contains the old standby of “general operating system fixes for stability, compatibility and security”, and users are reporting that the new Dock Exposé feature works now.

Rumors’ own beta/nightly-build aficionados and the usual suspects on the grapevine will be spending extensive hands-on time with Mac OS X 10.6 build 10a394 in the hours and days ahead; expect further related posts both on our web site and via our Twitter feed (@MacOSRumors) as information becomes available to us.

Are you running Snow Leopard 10a394 or other pre-release software such as the Mac OS X 10.5.8 Update code-named Athena? Drop us a line via email or DISQUS web comments, and share your experiences with the Apple user community!