This past week Microsoft has added two more dynamically updated RSS based Windows 7 themes to their collection.

It looks like these two themes are using community submissions from the recent open call for photos that the Microsoft Personalization Gallery started last month.

Since these themes are fed from a regularly updated RSS feed that means anyone can subscribe to the theme and get the backgrounds as well.  The actual theme itself can only be used in Windows 7 Home Premium, Professional, Enterprise, or Ultimate editions.

Terra Dynamic Theme

Exquisite and sometimes haunting landscapes from around the globe are showcased in this free Windows 7 theme. Explore caves, waterfalls, desert, meadows, and beaches through the lens of our community of contributors.

Subscribe to Terra Dynamic RSS Feed

Vineyard in the Adelaide hills, South AustraliaTable Mountain across Table Bay, Cape Town, South Africa
能高山上的小池塘 (Small pond at NengGao Mountain)Grasmere Village, Lake District, Cumbria, England, UK
Sugar maple tree by a split-rail fence in rural Vermont, United StatesWheat
थार रेगिस्तान Thar Desert, Jaisalmer, Rajasthan, IndiaRailroad tracks, Baldwin County, Florida, U.S.
Pfeiffer Beach, Big Sur, California, U.S.Head in the Clouds, 14th Street, Atlanta, Georgia
Derelict house near Burra, South Australia 

Flora Dynamic Theme

Vivid blossoms, dew-drenched leaves, and the elegant symmetry of grains are included in these images contributed by the Windows community. Enjoy the life and color of the plant kingdom on your desktop with this free Flora theme for Windows 7.

Subscribe to Flora Dynamic RSS Feed

Coconut Palm BudsJasmine blossoms
PansyAutumn leaves
चरपरी तेज़ लाल मिर्च Red Hot Chili Pepper, Kerala, IndiaListy
Juniper berries, Point Au Roche, Plattsburgh, New YorkSlunečnice
Pink flowersRed flower