One of the piggy banks I like is SmartyPig. The accounts give 1% interest right now and I find it really easy to get money in and out. They have dozens of sponsors who will boost your money by a 1 or 2% to sometimes over 10%. You can have as many goals as you like, and there's a social aspect for people into those kinds of things
I'm a really big fan of the online piggy banks.
We just drove our 2004 Honda coast to coast, and it's finally starting to give in, so it looks like we'll be in the market for a car soon, I'll definitely check out Boostup. Thanks!