As always, when we release a new version of Snort (yesterday's 188.8.131.52 release), I need to update the EOL notices on the website for versions that are going to die soon.
So, I've went ahead and done that. http://www.snort.org/vrt/rules/eol_policy
184.108.40.206 will EOL on October 17, 2012
220.127.116.11 is EOL now (actually EOL'ed last month, we've just now removed it)
18.104.22.168 will EOL on August 15, 2012
22.214.171.124 is now the current minus one
126.96.36.199 is now the current version
Please see the above link for further details, and be sure and upgrade soon!