Well, I think I found it! It was the cheapest one Best Buy had for Nikon (at about $50), but it seems to work just how I need it too! My other external flashes didn't have the ability to swivel from left to right (as well as up and down) like this one does; I LOVE the effect of bouncing the light off a source on the side instead of just the ceiling, or a wall behind me.
It's a LOT different than the external flashes I had prior, so I need to get used to it a bit, but here's what I got from playing around with it last night.
I shot these in manual mode with my 35mm at f/1.8, ISO 100, 1/20. Also adjusted curves in CS2. I'm happy with the way they came out, but I'll be playing around some more tonight!