I don't know if anyone else would find this useful, but I've designed a printable template for creature tokens that I thought I would share. I love creating stuff for the games. Hopefully someone else will find it useful as well. I plan to keep a few in my deck box for whenever the need arises.
This is actually a pretty interesting concept. Sometimes you just don't have the right token for a particularly odd creature, so this would be a nice way of making them "on the fly". I once glued a small piece of dry erase board to the back of a deck box for tracking life; if this concept were applied to a blank token made of dry erase board then that would really be something (of course, a stack of blank tokens will also do the trick nicely). Just be careful not to get that stuff on your hands.