The SNORT_2_3 branch was marked in CVS shortly after I first posted the snort-inline story. Release manager Jeremy Hewlett made the announcement. If you follow the instructions to check out Snort from CVS, be sure to use SNORT_2_3 for your tag and run 'autojunk.sh' before trying to run 'configure'. Remember this is not a new Snort release, only the appearance of new code in CVS.
Along with Snort, there are new versions of passive fingerprinting tool p0f, and the passive asset detection system (PADS) available.