Well ...all sites must have an about page.
I have used my GMail account for storing bookmarks for a long time now...
I had created a small javascript/php page to facilitate easy-tag-based-link mailing to my own email account.
So I implemented this small site to enable other GMail users to try the same functionality.
I think that the average GMail user quickly will see how this small and simple application can help sending those important links in a quick and unobtrusive way.
I have a blog
here