Here is an update from Martin of Tiremaniacs about the availability of the 700 X 25mm Schwalbe tubeless tires.
"Still no. Looks like absolutely nobody has it. The US Schwalbe rep mentioned that they have not come on the market yet. BTW, I raced on 23mm tubeless on Saturday (Roubaix style race in eastern WA) – fantastic. On my new Delta profile Rolf Prima ARES4 the width is exactly 25mm. 100 psi rear and 95 psi front. Perfect feel, feedback, and super solid setup. I am out of them as all my teammates decided to get them :-)
Cheers
Martin"