For example, I am interested in attending Paul Grahams Start up School if I can this year. Well, the site says that the event will be held in March and to check back in January for more information. But when?!
A quick Google brought be to Change Detection which promises to notify me whenever any page I tell it about changes. The sign up process was quick and efficient, so now I just have to hope it works as advertised. I also set it up to notify me whenever my blog changes, so hopefully I'll know that it works shortly after posting this.
Does anyone else have services they use for this that they'd recommend?