Good selection of texts and very nice concept: providing reading materials with glosses. Would really benefit from wider use of contextualizations, background info, etc. It would be an excellent group/collaboration project, with specialists in each genre/language proposing texts, annotating, contextualizing, etc.
Would be a good resource for intro to lit courses in the different languages.
Same comments as previous user. Plus - there are several ways this could be made cross-browser.
Some glossed areas ran together with preceeding and/or following words.