Arik Hesseldahl:

Jon Rubinstein, the former Apple executive who took over handheld maker Palm and moved with it to Hewlett-Packard in a 2010 acquisition, has left HP effective today, AllThingsD has learned.Rubinstein is said to have no immediate plans, and had completed a 12-24 month commitment to stay with HP after the acquisition. “Jon has fulfilled his commitment and we wish him well,” HP spokeswoman Mylene Mangalindan said.

Unfortunate, but not unexpected considering what’s happened with Palm and webOS.