It's a birthday card for my wife - I find that giving myself little assignments like this is a good way to learn by doing.
ANYHOW, here are the details for those that are interested:
I created all of the assets (background, props, character art) in Photoshop, since I was more comfortable drawing there, and then focusing on rigging/animating once brought into AS. I used AS Pro 9.5 (but have now upgraded to 11, WOO!). Editing was done in Premier. Simple as that.
Issues I ran into: the main issue I ran into is the one you can plainly see. Some of the bone deformations went really wonky during rendering. When I previewed the animation inside AS, everything looked good (in fact, I spent a long time making adjustments to get it looking good), but when rendered weird stuff happened. There's a part where the line-art of the guys arm straight up breaks, and then another point where the line on the girls arm gets all wiggly. This probably could have gotten resolved with a bit more trial and error, but I was running out of time, so I had to run with it as is. Other than that, photoshop played pretty nice with AS. I think in the future though I might just have to get good at using the AS vector tools and use textures, to avoid headaches.

Anyway, let me know what y'all think - I had a blast making it and can't wait to start my next little project (just gotta think of what I'm gonna do)!
PS- Wife's birthday is tomorrow, she hasn't seen this yet, so I will let you all know how it goes!