The Cradlepoint CBA750 is a follow-up product to Cradlepoint's first "broadband adapter", the CBA250.
The CBA750 looks to share the same case as the MBR1200 but features three usb ports, a single expresscard/34 slot, and NO WIFI (its not meant to be a "router" really.)
Like the CBA250, the primary purpose of the CBA750 is to convert mobile broadband to ethernet accessible IP, complete with "Public IP pass through".
The CBA750 can switch from a "configuration mode" which allows for management via web browser admin, or "IP Pass Through" mode where the unit bi-directionally converts from mobile broadband to ethernet, an ethernet to mobile broadband.
We have a preliminary writeup on EVDOinfo.com and are planning a full review after it ships on December 28, 2009
You can order the CBA750 at http://3gstore.com/
and discuss the CBA750 on EVDOforums.com