Here are another 50 wallpapers, or backgrounds if you prefer. I made these a little different than the last two batches. They are sized at 1280x960. They work with Mobile Shell 3.0, although some might be a little too "busy" in appearance. I've also tried them on my Titan (QVGA) with WM 6.5 and they resize fine, so they should work with all resolutions running 6.5. Since they are oversized they also resize fine in landscape mode. They also work fine on my Touch Pro 2 (WVGA) running 6.1.
First image shows thumbnails of the 50 wallpapers, second image shows some examples with Titanium and Mobile Shell.