Already mentioned that are on my list:
Matthew Good - Avalanche
Imogen Heap - Hide & Seek
I still remember the day I heard Born to Kill by the Matthew Good Band. I was at a red light in front of the Macdonalds by the Northland Mall. I'd been listening to the album a few times but all of a sudden this orchestra part near the end really resonated with me. To this day it remains my favorite song. Here's an ... umm ... interesting fan video.
... and holy hell thanks to this thread I found a live version:
http://www.youtube.com/watch?v=EdGzIrN-lCw