Two new Microsoft exams are currently or entering beta. The first, 71-506 (TS: Silverlight 4, Development) opened for beta on Oct. 14 and runs through Nov. 5. The promotion code for it is SL410 and objectives can be found here. It is expected to go live on Jan. 21. 

The second exam, 71-583 (PRO: Designing and Developing Windows Azure Applications) opens for beta on Oct. 28 and runs through Nov. 17. The promotion code is AZPRO and objectives for it can be found here. It is expected to go live on Feb. 15.  

Both beta exams are available through Prometric testing centers at no charge to those who sign up (providing there are seats still available). The betas are four hours in length and made available on a first-come-first-served basis until the seats are full.