[quote name='Aganar']Just a cautionary note that the type of Arabic Rosetta Stone will teach you is the kind that you will see written in books and newspapers: no one actually speaks it (unless they're a news anchor or a politician giving a speech). People actually talk to each other using one of the many Arabic dialects.[/QUOTE]
While it's true that the colloquial (foosha) arabic is very seldom spoken, people will understand you better if that is your root. You can then spend a little time to pick up the slang, and the dialect (the egyptian "gah", or the Syrian "oooh" for example).
The nice thing about the arabic alphabet is that it's a phoenetic language for the most part. You see the letter, you pronounce it.
Just knowing verbs and nouns will be very beneficial. I would also suggest learning the numbers well, as that is an easy way to find out where you on are a map.