Here is what Om Malik thinks about this acquisition, as for myself I could see how to use it for tracking comments I put on weblogs (and comments are useful). Now that I have a Gravatar tied to my email address, checking and parsing Gravatar.com’s webserver logs could tell where I leave comments (assuming the blog has gravatar switched on).

Here is the very few lines of code to make your Wordpress blog also Gravatar-enabled.