Microsoft has released two more themepacks for Windows 7, viz Arctic and Fireworks themes, and they can be downloaded from the gallery.
The Arctic theme is a 21 MB download and consists of 15 high-resolution wallpapers.
Light up your new year with this cool Fireworks theme. This 12 MB download contains 13 awesome wallpapers.
Windows 7 themes can only be used in Windows 7 Home Premium, Professional, Enterprise, or Ultimate editions only.