I've been able to find only two examples of live-tweeting by MSNBC. One is the ongoing live-tweeting of GOP debates. The latest was a week ago and covered the Florida debate. They've done others, but they can't really be compared because none of them have been curated. Pre-primary debates are transient things — have you watched any from 2007 lately? — but doing nothing to preserve them means no one can see them even when they're still relevant.
The second was by Richard Engel of the Nightly News. He was live-tweeting events from Libya on the ground in March. Like the debates, it hasn't been saved so it's been buried under everything else he's tweeted. But unlike the debates, people will want to read this months and even years later. Now we can't, unless we go to a lot of trouble.
The only Storify MSNBC has done is a single story on the tsunami that hit Japan in March. It is interesting because it mostly ignores the staple of every other Storify I've read: tweets. Instead, it uses photos from the reporter's Facebook and includes quotes in the text field.
What makes this strange is that MSNBC — like virtually every national or regional news outlet — has a major Twitter presence. Searching "MSNBC" under users gives a long list of results. Every program, anchor, correspondent and editor seems to have an account.
Apparently, my Digital Journalism II class has more experience curating on Storify than all of MSNBC. In live-tweeting, we're a close second. It's strange to think of, but interesting.