Hi,
If anyone is interested in learning the Tunisian dialect and wants to do a course for it:
http://www.net-langues.com/
They are offering a 'free online course of Tunisian dialect' I havent actually contacted them about their free online course as it's another thing on my list of 'to do's' so can not say what it is like etc but if anyone is interested then just check out the link above.
Take care