*chuckles* Exactly which type of "Space Opera" are we talking about here? Pulp / Buck Rogers style, or something along the lines of Peter F. Hamilton or Vernor Vinge? Because as a reader, I'm always looking for more of the second type, but I don't think pulp space opera is very popoular right now. Of course, there's the third group with Larry Nivens Known Space in it, which I enjoy, but I don't know how much in-demand it is.
That second type is called "New Space Opera" and it's fairly popular right now. Vernor Vinge, Peter F. Hamilton, Alastair Reynolds, Ken Mcleod, and Stephen Baxter are well known writers in the genre.
Personally, I have some New Space Opera projects in varying stages of progress.