Wrong web address, should be http://www.mybookstoreandmore.com
. Not much information about formats, but the news page says:
We have changed the way you select a format for your eBook. Instead of choosing the format and then buying your book, you will buy the book and select the format in your e-Bookshelf.
All of your previous orders will be in your bookshelf, even those from our very first launch in January of 2006.
I think this means the ebooks are what FictionWise would call multi-format, and usually this implies that they are DRM-free (because DRM providers charge per ebook per format).