This course of Syrian Colloquial Arabic seems to be very popular recently, because I have heard several people mention it.

It won't bring you to a very high level, but you will be able to function decently in many everyday situations. The main plus are the recordings: the speed of the dialogues is excellent, more or less what you would encounter in real life.

This post should bt right belong to mirko b, who found the original links and alerted me to them.

In three parts, with the pdf included.

Arabic (Dialect)