That's funny, but I've put that today on my to-do list, I was discussing that with "Star Wars Fanatic" on MSN Messenger (as somebody else than him added cars on Top Gear, and he wanted which ones were added).
I will probably add in the next few days a drop-down list to change the sorting order on the movie pages.
I planned to do the following possibities:
1. vehicle make + vehicle model + vehicle mk + vehicle year (like current)
2. episode number + other vehicle info
3. importance + other vehicle info
4. vehicle ID (allows to see latest added)
5. picture date + vehicle ID (same, but also shows what pictures were replaced)