I just received a leather case for my Omnia 910. I found it at the Jabashop on ebay.
http://cgi.ebay.com/Carrymobile-s-Le...4.c0.m14.l1262
I liked the idea of having a holder for the stylus.
I ordered it on 2/28 and it arrived 3/11 from Hong Kong -- faster than I expected.
The cover is side opening, not a pouch. the fit is very good, the leather is fine and construction seem to be good. All the cutouts line up. I wish it was thinner, but it is about the same thickness as my old Verizon Treo 650 leather case. It comes with a screw on piece which fits in the included belt clip.
All in all seems nice. I miss my Seidio rubberized case I had on my 6800. Maybe Seidio will add one for the Omnia. In any event for about $24 with shipping this seems like a nice solution, expecially with the stylus holder.