I would think a parked .com could be a real plus. Pizza.com is parked, and since it is still parked and this is 2007....there is a good chance it will stay parked and generating a tidy sum for the holder for years to come. I think that creates more opportunities for the new owner of pizza.mobi
If pizza.mobi is developed and optimized well, it should do very well in search results versus a parked name. Type in traffic isnt everything, a lot of money could be made in having a pizza domain come up high in search results....on a mobile or pc screen.
A decision of whether or not to reg one mobi name that sounds pretty compelling? Now that the prices are lower and you can reg for one year, just skip the next two or three lattes you'd be drinking and buy it...