Here is the down low.... if you don't want to get flamed or the imfamous use of these smileys then i suggest you make use of a simple search. There is tons of information here.
I am feeling pretty good so here is the answer to your question:
There are no suitable in car radios as of yet. Seth is working on a radio that will be up to par with the headunit and i am waiting for that. In the mean time the best reception is the Hauppauge Wintv FM and TV tuner (and the most expensive)
Others use RadioXtreme(ly crappy pooppy pants). I have this one and it sucks but is better than the Dlink crap.