My latest little venture is a free service called l8tr.org. It's for all those times when you want to visit a web page but can't because the web page is running too slowly, or is completely overloaded, or you are in the middle of your work day and the page is NSFW.
Just type in the URL of the web page, and your email address. l8tr.org will check the availability of the web site and once it becomes available you'll receive an email.
That means there's no need to be frustrated when you can't get to a web site. l8tr.org will watch it for you and send you a simple email reminder.