I love eastern scales, they sound great when you're tired of really predictable western scales and don't feel that warm "my brain is computing music" feeling anymore.

If you want some eastern scales I have tons on my brothers website, just go to "friends", Andrew F. and then follow the links to my scales resource. There are about 40 scale types (that's excluding modes)its at http://www.classaxe.com

Here are some relevant tricks of mine, got harmonic minors (used often in western music but more of an arabic thing really), bhairava scale (very easy scale to finger, very very heavy, full of useable chords and only one note different to harmonic minor) and a hungarian major thing that's like a diminished missing one note and is really scary.

http://www.guitartricks.com/2000/trick.php?trick_id=5038
http://www.guitartricks.com/2000/trick.php?trick_id=4504
http://www.guitartricks.com/2000/trick.php?trick_id=3524
http://www.guitartricks.com/2000/trick.php?trick_id=3382