UPDATE:
Universal Home Video has announced 1-disc ($29.98), 2-disc ($34.98) and Blu-ray ($39.98) releases of Mamma Mia! which stars Meryl Streep, Pierce Brosnan, and Colin Firth. Extras on the 2-disc will include on-screen lyrics for 22 musical numbers, 3 featurettes (The Making of Mamma Mia!, Becoming a Singer, On Location), Amanda Seyfrieds "Gimme! Gimme! Gimme!" music video, and much more. The Blu-ray release will include all that, along with the ability to record your own video commentary track, and extra BD-Live content.
The R2 will have this gift set.. not interested though.. will just pick-up the 2-disc R1..