As always, when we release a new version of Snort (yesterday's 126.96.36.199 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
188.8.131.52 will EOL on October 17, 2012
184.108.40.206 is EOL now (actually EOL'ed last month, we've just now removed it)
220.127.116.11 will EOL on August 15, 2012
18.104.22.168 is now the current minus one
22.214.171.124 is now the current version
Please see the above link for further details, and be sure and upgrade soon!