an open letter to Google

Here's a feature that I want, and it can't be that hard.

Right now I can use google maps to chart how to get from my work to my house.

I can also find Blockbusters (for example) in my area.

I want the ability to find the closest Blockbuster to my route home.

In other words, I want to go to store X. Which store X would involve me going the least far out of my way on my commute home?