Evite Sucks. Now What?

When I want to get a bunch of people together for a party or business gathering, I often find myself reluctantly turning to Evite. I hate it. Besides for the late-'90s styling, it's got a clunky interface, is packed with ads, and forces guests to go to the website to get details. But I'm familiar with it, as are all my guests, so in the interest of smoothness, I often reluctantly come back. But there are tons of other, better invitations services out there. Here are a few I've tried:

1) Facebook: It's easy to use, easy to invite guests, and easy to update information. Plus, you don't feel like a spammer. But it only works if most folks you're dealing with are already on there.

2) Socializr: The most Evite-like of the group I've tried, except that it's much less annoying and creates urls for events. I haven't tried Pingg, but I hear that it's also head and shoulders above Evite.

3) Mobaganda: My current favorite (and one I just heard about at TechCrunch). You don't even have to sign up to create an event, but it's so bare bones that all you can do is point to a time and a place. But that's all I ever really want to do anyway.