Chrysler is private now. You can't buy it even if you wanted to...
I believe the deal is that Cerberus (?), who is the majority owner of Chrysler, is also a partial owner of GM, and they are talking about trading shares that would make them the majority owner of both companies. It's not like they are going to change any nameplates or brands, you'll just probably see the demise of Pontiac, Buick, and Hummer (Hummer will be sold off, the others will go the way of Oldsmobile). It's not necessarily a bad thing, since they already share some of their technology.