As far as feet are concerned, there are only two types of foot print available: the Series 1 Robot's foot prints, and the Series 1 Spaceman's foot prints.
Interestingly, the collectible minifigure leg decorations have been on LDD since version 4.0. However, the decorated parts themselves are newly available in this version because the legs now have decoration surfaces printed in, whereas previously there was no way to put decorations of any kind on the legs. There are two other decorations that were previously available but without a surface to put them on the appropriate piece: the Knights' Kingdom and Fantasy-Era Castle shield prints.
Now, of course, these decorations are easily accessible with the decoration tool. In contrast, many of the new decorations (even those like the Kingdoms leg prints that appear on pieces with decoration surfaces) are not listed when using the decoration tool, and can only be accessed through DesignByMe mode or through entering the decoration ID into an LXFML.
Also, I forgot to mention there are a couple errors with many of the new decorations. The dark green skirt print is upside-down. The face prints for Jake Raines and the City boy with freckles have problems with their transparency. Most of the Hero Factory decorations are blurry, and there are some issues with the side decorations on the V-Wing pilot helmet. However, these are all minor errors, and the most serious will likely be fixed in future updates.