If you write erotic romance and if you can put out a decent short story, and I do mean short, they are taking submissions over at Harlequin for their SPICE briefs line.  These are ebooks, ranging from 5k-15k word count,   (told you it was short).

They are also looking for historical Christian romance as well as YA books for their new AA line, TRU.

You can read more about it here.