Not much about Tee-Wee in there at this time, but I have to say that it works really well with Chapbook, but I've not had success with other formats yet. I have tried the Tweego provided formats, and they seem to all fail on the load of the format. I'll throw dialogue (I think a previous version was throwing an error). It looks like there is some issue (just looking at two of the Harlowe formats) is the </html> tag location (both of them are having an issue with that).
Oh... Um... It's only the Harlowe formats that are failing.