We've all found great sites and/or resources that we want to share with students, friends, colleagues, and have ended up with email splitting the web address because the URL was too long. There are two great sites for making short URLs.
First is TinyURL.com. It's been around for a few years, but now has a great new feature that allows you to customize your tiny URL. Clicking http://tinyurl.com/GVC0901 will take you to the Global Virtual Classroom's primary sites grand prize winner. This is much easier for students and parents to remember than the longer URL. TinyURL does not require a signup to use it, and is quick and efficient. It can also just generate a random URL.
A second choice is bit.ly which only requires a sign up if you wish to customize. Using the same site as above, the customized bit.ly URL is http://bit.ly/GVC0901. Shorter than TinyURL, but takes more time if you need to log in. No login required to generate a random short URL.