Google have announced that today they have added Picasa Web Albums as another source of user-uploaded, geo-tagged images within Google Street View.
When you open Street View in Google Maps you will now see pictures from Picasa as well as from Panoramio. Google's new 'Photosynth' type navigation in Street View seems to work fairly seamlessly between photos from Picasa and photos from Panoramio.
Check out the photographs in this little hack I created a few weeks back. You should be able to see Picasa photographs as well as pictures from Panoramio.
Via: Google LatLong: Picasa photos in Street View