Foregrounds would be cool, but if you were going to code in an extra image layer I'd rather see it used to add multiple expressions to characters- just add a new image over the old character with everything transparent but the face. Each overlay would just have to be character dependant.
Doing something with the contests is something that seems like a good idea, but since the system works well now there are things I'd rather see.
And make sure comments by non-donors don't get picked up in search engines to avoid spam.
What I'd like to see:
A separate profile page instead of a field above our comics (the field could then be limited in size so the comic always appears completely on the screen).
Google ads below the comics, or an option to pay for these to be removed from our individual pages.
An experimental donor-only maker that doesn't use transparencies and renders comics. And then sell me the code.
A new homepage layout that features the full comic of the day.
A way to open up the dropdown comics lists, and 'find' the next comic in the list that starts with a letter by pressing that letter.
Fix the bug that makes the last line of text giant.
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Dinosaurs had eggs bro, the chicken came way later.