I bought this great car dock on Amazon but the manual says it only works w/ Froyo. I thought, "no problem" I'll get it to work after I root the phone and eventually upgrade to 2.2.
Even with the latest update 2.9, I still can't get the aux jack to work on the car dock. The power plug works fine, but the phone still defaults to speaker phone for music, phone calls, etc rather than playing through the dock's integrated aux. out port.
Amazon.com: Car / Vehicle Mount for Verizon Samsung Fascinate Galaxy S: Cell Phones & Accessories