Thanks for the feedback, I'll get some revised designs posted asap.
Regarding the question about being able to seperate the mouth from the letters: yes,
at the end of the contest the winning designer uploads an .eps file, which is editable & a
.jpg file. Also, it is common for the winning designer to email seperate variations of
the winning design (ie: elements removed and/or color variations etc.)
I'll get to work on some revised designs right away.