Lots of speculation about whether or not Steve Jobs will make a surprise appearance at the upcoming Worldwide Developers Conference event beginning Monday. (Here's just one article featuring said speculation.)
My two cents? It'd be a mistake. Now's the perfect time to show the world that Apple can run without Jobs, because even if he returns to robust health -- and I for one hope he does -- he may at some point simply want to retire. Best to avoid the stock dip that announcement would spur.