I wrote about eVite and Pingg alternative Crusher when it was brand-new in 2007, but I've never actually known anyone to use it, until last week, when I got a Fourth of July invitation to a barbecue via Crusher.
I was seriously impressed: clean lines, tools like polls to figure out the best date for everyone, and awesome features like avatars and html snippets (so you could add your own maps or widgets). I was so impressed, in fact, that I started drafting up an invite for my next soiree!
I love how you can gauge how likely you are to attend the event, and modern look of Crusher — especially how easy it is to customize the invite and make it look as amazing as the party will be. Have you tried Crusher yet?