I have been seeing a bunch of Miata(NC) rental cars coming through my work lately (a large hotel in Sf). Last week there was a cluB edition prht, and this week theres been a few grand touring models. Unfortunately, they are all Automatic of course. But at least its a small, fun rwd car that has a TC off button. They seem to be rented from enterprise or national (same company now) . If i didnt already have an NB i would rent one and take it autocrossing :)

Heres a pic from this morning-

Heres a press release i found from enterprise from last year:

miata rental