Visited the plasq site today for a check up on progress to final release date for Comic Life. In the forum they seem confident that the current beta version, Beta 4, will "very likely be the last" it is available for trial until November 1st.
"This latest beta includes many small improvements relating to memory usage, user experience and stability." Hopefully this will mean it is less clunky. I can't wait to get my hands on the full version, and to begin using it with my students.
If you want to try out the Beta you can download it from Plasq.