This isn't a good place to get that information. There are now some of us who are starting to create EPUBs, but the vast majority are not doing the fancier kinds of EPUBS (fixed layout, animation, etc.)
You should look for other resources. Mobile Read Forums are probably a good place to start:
Also look at the blog posts of Elizabeth Castro:
The best discussions are probably on Twitter and private Facebook groups. This Twitter hashtag is a good place to start: #eprdctn (for eBook Production).