I don't really know. Everyone (even Keystone Phil) seems to believe Casey has a lock but until we get campaigns up and running and see how things shake out with the media, debates, available resources (including money) and who wants it more... I just don't know.
I believed Casey was a lock for governor in 2002. I believed that Klink was a lock in 2000. I believed Singel was a lock for the Democratic nomination for Senate in 1994; same with Bailey in 1986. I believed these at this stage of the game.
The key, IMO, is who else, if anyone else, will step into the Democratic Primary in 2006. A name you might hear is William Kiesling. Not a good candidate, but a "muckraker" in the worse sense of the word.