I noticed that in addition to the packaged InstaDMG pre-release there is plenty of user-contributed code fragments throughout the forum. Do you have any thoughts on setting up a repository? You could commit code fragments in bits-n-pieces, but still only “release” a version of InstaDMG after you’ve had the chance to verify and QC everything. A new user desiring to be on the “bleeding edge” of InstaDMG use could checkout the head of the repository with the knowledge and caveat that HEAD may be borked, but will contain everything.
Low maintenance for you between releases (especially if you get patch files instead of forum posts), but still a good consolidation of all the great ideas floating in the forum and possibly other mailing lists.