With all the new dynamic themes available from Microsoft now it looks like we will get updates on different days.  Here are the latest updates for two of them.

The older Bing Dynamic Desktop theme is compiled of photos that appear on the homepage and the new Bing Aerial Images (Europe) theme, which is also updated using a dynamic RSS feed, highlights overheads images from across Europe.

Bing Desktop

Fabric Drying in Dyer's Souk, Marrakech, Morocco.  Skeins of fabric hung to dry in the dyer's souk, Marrakech, Morocco, North Africa. Polar Bear (Ursus maritimus) rolling in the snow, Beaufort Sea, Arctic Coast, Alaska.
Fishing village of Reine and coastal mountains in the Lofoten Islands Blue Lake reflection, autumn dawn, St Bathan's, Central Otago
Fairy basslet fish dart among blooms of lettuce coral near the Phoenix Islands, Kiribati, Micronesia Martinique, beach pier, aerial view

Bing Maps Aerial Images of Europe

�le d'Ol�ron, France Farm field maze Lempdes, France
Pozohondo, Spain Clamerkin Lake Northwest of Newport, England
 Gulf of Taranto, Northern Ionian Sea Torre Colimena, Italy  Southern Coast of the Adriatic Sea Mola di Bari, Italy
 Nard� Ring Nard�, Italy Tulip Fields North of Lisse, Netherlands
Oyster farm West of Ronce-les-Bains Oyster farm