It's been a little while, and I've had a few new additions.
James Bond, Volkswagen, and some sort of weird Japanese muscle car! I've also started getting one for my son whenever I look, he's taken an interest of late and it helps to keep him from losing mine before I take them to the office. That being said, I bought the $2 3 ft of track last week. We had a lot of fun setting it up on the couch and running the Hot Wheels down it.
Here's the whole collection, just for kicks: