Graphical titles would open a big awful can of worms and I don't want to go there.
I don't really see the need for a static title and subtitling feature, though if you want to use the same title all the time, you can bookmark a version of the make a comic page like this:
http://www.stripcreator.com/make.php?title=This%20is%20always%20my%20title
This will automatically fill in the title field with whatever text you write after "title=". (In URL land, %20 equals a space.)
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