Is there a reference design for the LM3S5B91? Is there an Jtag/Debug Emulator for this part or do I need to buy an Eval Board to program the MCU?
The Stellaris "home" page is: http://www.ti.com/stellaris
Look on the 'Kits & Modules' Tab - that lists all DevKits, Modules, and Reference Designs:
http://focus.ti.com/mcu/docs/mculuminarykitsapps.tsp?sectionId=95&tabId=2488&familyId=1755
Look under 'Design Support' (in the black ribbon at the top of the page) for 3rd party tools like JTAG probes;
See also: http://www.luminarymicro.com/products/3rd_party_resources.html