Have you noticed how web addresses are gettting longer and longer! Take for example, if I wanted to tell you about my book due out in January, Dyslexia in the Digital Age:
Standard link: http://www.continuumbooks.com/books/detail.aspx?BookId=133190&SubjectId=940&Subject2Id=1067
The TinyURL website allows you to cut it down into something manageable (here I used the abbreviation of the book - dida - and the author).
You can register your own links at www.tinyurl.com