Cowboy,
Well, failing to find anything of use on their website, I searched all my usual hangouts for information. Nothing. I did find some third party (and hence, suspect) information from a couple of loops on STARbooks anthologies. Apparently, there's no advance on the stories, and the pay is quite low ($30 in two instances, with two free copies of the book). It doesn't bode well for advances on novels. But just to be safe, I've sent an email to the STARbooks editor, requesting information on a) their advances; b) royalty percentages (and whether it's on net or gross); c) whether they're primarily pubbed in ebooks or trade paperback and d) whether they're accepting submissions right now. I'll let you know on this thread if I hear anything back from them, and then will post the information on the "Where to sell you romance novel" thread (since it would seem to apply to that forum.)
I found a bit more information on Haworth, but only as it relates to their non-fiction gay/transgender titles. It does appear that they pay a small advance (bits and pieces on various sites seem to indicate about $500-1,000), and they're primarily in trade paperback. But I couldn't find any information on novels in their line, and the link to their website was 404.

Don't know much more than that.
Sorry I couldn't be of more help, but I'll let you know if I hear anything from STARbooks.