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