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