First of all, how about using Spotlight and typing in “m w”?
If not, and I’m just curious - why wouldn’t you use something like LaunchBar?
The reason I ask is that I could certainly create something like that, using the techniques I created originally for Spotlight Search Prompt, and pretty-much perfected in KMFAM Favorite Actions and Macros, but with apps like LaunchBar and Alfred, I don’t see what I could provide that they don’t.