I've stumbled across the blog of this language learning website and discovered number of posts useful to students of Arabic, and particularly of the various colloquials. It probably deserves deeper exploration, but meanwhile a few selections:
How different is Moroccan Arabic to the other Dialects, Really?
Learning Arabic in Qatar and the UAE is Easy. Here's Why . . .
If I Stated Learning Arabic Again, This is How I'd Do It
and particularly, a selection of online Arabic TV and YouTube channels: 40 Excellent Arabic listening Resources in All Dialects