This is what is being reported in local media.
My favourite local blogger has this additional info:
Update 4: I lied, the filing deadline for the Indiana Primary for Senator is tomorrow, February 16. See it for yourself here.
Also, how did we not see this coming. Bayh never filed for access to the Primary Ballot according to the IN SOS website. See the list of filed candidates here.-------------------------------------------------------------------------------------
Update 5: Here's what is going to happen, in my opinion. The INDEM Central Committee has until June 30th to fill the primary vacancy for US Senator. The INDEM State Convention is June 26th. I think that the best thing to do would be for the state party to allow a floor vote on the candidates for US Senate. Then in the subsequent days, the Central Committee could ratify the result of those votes, therefore allowing the Party Activists to have a vote on the matter and still following the rules.
http://indydemocrat.blogspot.com/2010/02/evan-bayh-to-retire.html