Have you guys tryied P1 casing?
It's preatty nice looking, and handy. Xperia fits almost perfectly in it. It's just 1 or 2mm too long, but casing straches with time, and after while it's perfect.
I used this casing with my P1 for almost 1,5 years, now I'm using with X1 for 2 months, and I can say, that it lasts maximum a year (it gets dirty and streches - very hard to clean). So if you want to buy it, buy 2. I'm not sure how long it's gonna be available.
here is a link to polish SE shop site. I couldn't find it on british.
PS. It's made of suede, or whatever is english word for it.