One thing about things going into the Mac App Store is that there is no trials. This looks like it may be great for my needs but there's no way to try before I buy... now, it is just $3 so, why not?
For me it's worth giving a few copies away to users who like to give feedback. :-)
About archiving, I've been asked about this before, and now I'm pretty sure this will be needed for the next version. So maybe you are better off waiting for the next release.