Launching Next has discovered 2 tweet longer startups.
TwitLonger - When you talk too much for Twitter
TwitLonger is a simple service that lets you post those tricky messages that really do need more than 140 characters and send them to Twitter
Math.com - World of Math Online
Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly.