manbirdexperiment wrote: 
The router is a separate unit. The 3G networking piece is provided by a USB data thingy provided by Verizon or Sprint. Both carriers provide nationwide service. Basically it works anywhere there's cell service. In most areas (including all major metro areas) the connection is fast enough to support 64k or 128k streaming. Out in the sticks, the connection may be slower — but it's always fast enough for 24k AAC+, which still sounds pretty decent.

 BillG wrote: 
A couple novice questions (because I know next to nothing about 3G networking or WiFi). Do you have nationwide connectivity? And is your router and data center built into a laptop? Or into your vehicle? How far away can you wander with your iTouch and still be in network? I have an iTouch but without connectivity, I'm really only using one of it's many functions  - the music player. 

thanks bill, this is great!

I was looking for this a month or so ago!

I'm reposting this from another forum. I'll be writing more on this subject soon:

My preferred in-car listening setup is a 3G WiFi router (with a Verizon data card) + an iPod Touch.  That way I can listen to RP via the iPod, and connect to the web on my laptop (or multiple laptops/iPods if I have passengers), all with a single data account. Verizon's network is also faster & more reliable (at least in my opinion) than AT&T's.

The best 3G WiFi router I've tested is the Cradlepoint CTR-500 ($179 from Amazon). That coupled with a USB data card from Verizon, Sprint, or AT&T ($50 - $60/mo) & an iPod Touch is the ultimate in-car listening setup.

Of course, if you want to listen away from your car & home, an iPhone or a multimedia Blackberry is the way to go. The iPhone is by far the better performer for web radio, but the Blackberry Curve & Bold are OK also (I hated the Blackberry Storm that I tried).

The Blackberrys also do not come equipped to play web audio. I needed to buy a app called BerryTunes ($20).  On the iPhone there are plenty of free apps (including our own Radio Paradise app) that will play RP.  BerryTunes plays audio, but does not display song titles or other info.

Another note:  look for a new,improved mobile-device version of the RP website debuting soon (this weekend? next week? something like that...).  Stay tuned.