johnkzin: Sorry but I use that setup DAILY and it is tremendeously portable and transparent. The term USB router in this case means the USB modem connects to the ROUTER.
I find the solution is extremely practical and functional. The modular nature of it means if a single component fails it can be replaced easily but should any single component of a all-in-one setup fails then that device is a brick.
BTW, the Cradlepoint CTR350 also now supports router to router wifi networking, HSDPA devices and the WAN/LAN port auto detects what mode is required when hardwired to something.
I could have bought a Cradlepoint PHS300 which has an user replaceable LiON Poly battery but I wanted the ability to wire into my home network if DSL went down.
And I never even mentioned connecting the EVDO modem to the USB port on the NIT's as an option...in fact the NIT's are PROBLEMATIC due to their current design and that wonderful but just PITA sometimes placed kickstand... I actually use it as a handle as much as I do a stand. I find it aids me in making sure I don't drop the device. I have hand probs that can make holding something difficult and I often will drop something for no apparent reason...at least it proves gravity still works...hehehehe...