Ipod your car

We'll be heading on a rather long road trip after Christmas and I wanted to get some advice on what the best accessories are for using your Ipod in your car. There's a couple of products by Belkin and there's the Itrip etc but has anybody got some recommendations?

One guy at JB HiFi said the Belkin Tunebase is one of the best..

I use the tuner which you tune into radio stations to play your ipod. The only problem is if your somewhere like a capital city who have alot of radio stations you can get a fair bit of interference.