I agree with all of the people here who believe it's a slim chance of him making it to next years draft but I don't believe another team will give into his contract demands and spend a high draft pick for him. Stranger things have happened and he's already shown himself to be pretty stupid on the contract negotiations.
Here's a great article that explains all of his options.
Well, alright, let's say the 49ers can't work out a deal that makes sense for them and he re-enters the draft. Crabtree cannot even being to talk to another team until the day of the draft, as per the CBA. So no combine, no pro day, no big workouts for NFL brass. No phone interviews with execs. Nothing. The 49ers control his rights until the 2010 draft. So, after missing the combine in 2009 due to injury, teams still wouldn't have recent measurables on him or know his 40 time. There would be no recent film on him.