GPS on a laptop linked to social media

Lots of social media-ish tools could gain allot by adding location information. E.g Blogging mashed up with google earth and blogspot or a location added to twitter. What if this were done automagically by taking gps coordinates from you laptop (requiring a built in GPS in your laptop, or a wimaxish triangulation System, I wonder if any laptops currently have this). This would be awesome for travel blogs and site surveyish stuff.