I actually just received a complete set of flashcard lists directly from CLO - I'll post them here once we've got them converted. (thanks very much for posting this - the email with the lists landed in my junk mail box for some reason and I might not have even discovered it if I hadn't gone looking for it after reading your post)
OK, here are the files. These are standard UTF-8 text files; they don't include their own definitions, so there are about 81 entries with no corresponding definitions in any of our dictionaries, but you can find / fix those by searching for "incomplete" in "Search Cards." (if anybody wants to fill those in and post an updated version with the missing definitions inserted into the files, feel free) Thanks to Adam Menon of CLO for providing these.
Here is an updated version of the Flashcards for the vocabulary for all 420 CLO lessons WITH definitions!
If you're an existing CLO subscriber, we have added Pleco's format to our export page here: http://www.newclo.com/lessonexport
So you can choose a range of lessons you want to study and what items (words, characters, supplemental vocabulary) you want to study, and it will export that content directly into a Pleco compatible format.