Well, as many big names that were on the ballot this year, it's not surprising no one got in. Not enough votes to go around for all of them.
Biggio and Piazza seem likely to get in. I'm not so sure about Bonds and Clemens. Sosa's low vote percentage was really surprising. I didn't think he was as marred by the steroid brush as Bonds and Clemens for example.
Next year it's only gonna get more complicated. Maddux, Glavine, Kent, Thomas, and Mussina are all likely to command a high number of votes. Normally I'd say Maddux and Glaivine both are first balloters, but hard to say with the widening field.