If an Italian Sonia can be the unconstitutional PM, then what is wrong in Jaya or Mulayam in forming a third front. People remember Jaya's bringing down the NDA govt, but it was also she who brought BJP to the South in the first place! In politics there are no permanent enemies or friends, and let's apply uniform yardstick for corruption.
And by the way, the third front parties are basically allies of BJP trying to position themselves for a hard bargain when BJP needs their support for power in 2009. These are all anti-Cong parties so their only hope is for BJP to do better than what it is doing now. And they don't want to risk losing minority votes for nothing- so they will not support BJP for presidents poll, which anyway is to be decided by the Madam and her commie anti-national friends.