http://boulderinn.com/ A 15-minute walk from the conference venue on the University of Colorado-Boulder campus, the Boulder Inn has recently renovated rooms with views of the mountains.
Rates are US$104.00 plus tax per night for a king-sized bed and US$114.00 plus tax per night for two queen-sized beds.
You can make reservations with Ari Rubin by email (email@example.com) or telephone (1-800-233-8469). (Mention the Colloquy to get the special rate.)
They are accepting reservations for the discounted rate from November 2011 until 11 May 2012.
The fare is $13 US ($6.50 for age 65+ with i.d.). Ask for a transfer, which you will use to take the local bus from the Baseline stop to the Boulder Inn. Fares are payable only in cash and the drivers cannot give change – but fellow riders can usually change a bill if you have only an ATM-issued $20.
See Denver International Airport web page on ground transportation.