Paul Rademacher has created a Google Earth mashup in which you can overlay the extent of the Gulf of Mexico oil spread as of May 6th on any place on the globe. How big is the slick compared to where you live? Remember that the gusher will only keep widening in extent as long as the oil continues to spew out of the leaks in the riser.
The oil spill on New York City (and New Jersey and New York state and Connecticut):
The oil spill on Chicago (and Gary, IN and Lake Michigan into Michigan):
On Houston (D notes that the eastern arm spill stops just short of the Louisiana border):