I've seen no news specifically about the release of Tecfidera (BG-12) since this thread a couple of weeks ago:
http://www.medhelp.org/posts/Multiple-Sclerosis/-BG12/show/1880374
From a Reuters article Monday on Biogen quarterly results, I see this reference to the second quarter (April-June), which supports our earlier thoughts. "The oral drug BG-12, to be sold under the brand name Tecfidera, is expected to become a leading treatment for multiple sclerosis after its planned second quarter introduction." http://www.reuters.com/article/2013/01/28/us-biogen-results-idUSBRE90R0KR20130128
If Tysabri (or whatever DMD folks already use) works, you might not necessarily want to be the first to rush to the new drug. There is seldom a free ride in terms of efficacy and side effects.