If his receptive is good it wouldn't be MERLD, it would be an expressive language delay (or disorder). Although it can be tricky to parse out receptive language at young ages.
You can join Dr. Jim McDonald's Communicating Partner's Yahoo group. It's a very active group of parents with kids with language issues, and Dr. Jim is an speech therapist and former Ohio State professor with decades of training and comes on frequently to comment and offer tips. His website is
http://jamesdmacdonald.org/Articles/MacDonaldStart.html
You can also join us at www.naturallatetalkers.com, although most kids there also have receptive delays.
There's also the Hanen method:
http://www.hanen.org/hanen-programs/programs-for-parents/it-takes-two-to-talk-parent-program.aspx
Also, I've met parents whose child wasn't saying anything at 2 but was caught up by 3. So you never know. But a good evaluation, followed by using some of the therapies above, can go a long way in easing your child's frustration.
Good luck!