Spherical Environment Maps

I know that [email protected] has some great skymaps, but anyone know of more urban skymaps? I’m not being able to find many, so I might start making some, but anyone have suggestions?

Here are some HDRIs:
http://hdri.3dweave.com/library/
http://www.debevec.org/Probes/

You can convert them to bitmaps with HDRView:
http://www.debevec.org/FiatLux/hdrview/

And it might be possible to make them spherical with HDRShop:
http://www.debevec.org/HDRShop/
http://www.debevec.org/HDRShop/tutorial/tutorial4.html