I know people will argue until the boxed CD's arrive, but to hopefully set things straight:
1. 6c115 is the build that will arrive in Jaugar boxes on August 24th. This build has been released internally inside Apple and to developers.
Specifically, the build shows the following in the Apple System Profiler:
Darwin Kernel Version 6.0: Sat Jul 27 13:18:52 PDT 2002; root:xnu/xnu-344.obj~1/RELEASE_PPC
2. There are already a number of known bugs, including the Finder FTP bug which has a very high priority to be fixed. Most of the bugs are minor and most have been logged for fixing.
3. An update (Maybe "10.2.1", but it's too early to say yet) will be released early in September to fix those bugs.
To put these things in perspective - Apple doesn't just stop
work on OS X after a release build, the developers are still working day-to-day as they have been, and more internal builds are being created. At some point every now and again a build is declared suitable for release allowing for various factors (timeframe, the purpose of the build etc).