Yep, It'll work. But it will eat all of it, regardless of how much you have.
I'm rocking an older '08 MacBook, it runs it just dandy, but it can easily eat up 6GB + of my 8GB just scrolling around with some RAW photos. But with the SSD and if Aperture is the only intensive app running, you should be fine. I've ran it on 2GB before and it was "OK". Just a little slow.