I got this email today:
I am considering publishing with Virtual Bookworm. I saw them listed on your list. Anymore you can tell me about them.
They are a print-on-demand publisher, also known as a "vanity press." They will not get your books distributed to stores. They will not promote your book. And you will have difficulty getting the book reviewed or taken seriously by anyone (not to mention selling any copies). You may have even more problems than that… just a simple "Google" search on them turns up nothing but complaints and warnings, like this one:
Writer Beware has received a number of complaints about Virtual Bookworm. Most involve unpaid royalties, or royalty statements that don’t reflect the actual number of books sold. Some authors are looking into legal action.