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Ellora's Cave is a publisher of erotic romances, some novel length, some novella length. They are chiefly an e-publisher, though they do publish some paperback books.
Don't ever let the "e" element of publishing put you off, especially if you write romance of any kind--this is the fastest growing segment of publishing, and publishers still maintain the same standards for their e-books that they do for their hard copy books--only now the costs are lower and you can read them on your Kindle. Ellora's Cave sells about 70,000 e-books a month.
You can go to the Author Submission guidelines to see just what they're looking for, and I encourage you to check out the rest of the site, as well.