For anyone who hasn"t heard, Microsoft will be blocking all MSN Messenger versions, MSN Messenger 5.0 or Windows Messenger 4.7.2000 and lower. It has been a part of their scheme to force users to upgrade and to get rid of thoses third-party clients that hack into the Messenger server.
Well today, was the day, October 15th and Microsoft has confirmed that it is the final day for upgrading in order to stay connected.
Other clients offering access to Messenger but incompatible with the protocol change, became outmoded and MSN officials say "98% of our customers have made the necessary switch". Microsoft encouraged third parties to submit an online form to seek a formal arrangement. Now they are in negotiations with several of them, but that none were ready to be announced.