I was pointed to one of the most valuable resources if you want to learn Egyptian Arabic by Benny The Irish Polyglot:
Lisaanmasry.com is essentially an online dictionary but it is a bit more than that. It also gives you pronounciation via an audio file and it conjugates verbs in a very easy way.
Check it out.
Also, make sure you check out the adventures of Benny as he makes his way through Egypt (www.fluentin3months.com).