Find and Create Events on Twitter
I found this site, which is really cool for adding events to twitter. There is a control panel to organize and manage them as well. Below is the list of features offered. Check it out.
No Registration Necessary
Use your Twitter or Facebook account to login, manage and track your Tweetups.
Find Local Tweetups
Easily search for local Tweetups. Sort by popularity, distance or date.
Easily Organize a Tweetup
Create and post your Tweetup invitation in seconds.
Customize with Colors & Themes
Choose from many different Tweetvite designs or create your own.
Add Pictures & Video
Personalize your invitation by adding your own pictures and video.