MRC has added 2 new sound decoders to their sound line up:

0001862 16-Bit Sounder (MP15/SD-45/Electric) 
This is a 16 bit Sound Only decoder that is replacing the 0001662 Sounder. All 28 NMRA functions are incorporated and an on board full fidelity speaker. If you already had a 0001662 on backorder from Tony's, these will be updated to the 0001862. Expected in June 2010.

0001953 N-Gauge Universal (ALCO, EMD early, SD60)
A very small "Universal" full featured diesel sound decoder that is adaptable to (most) N-scale diesel locomotives. Expected in June 2010.