Gah! Dude, you rock! It's working perfectly now!! HTML displays properly in the summary, covers are updated properly, images display correctly in the epub (and look fine when converted to mobi), and the TOC and chapter marks are working wonderfully when converted from epub to mobi. Also, calibre now displays the character tags, word count, number of chapters, status of the story, and the age rating! This place is awesome!
Thank you! 