They are a beautiful fish and I am extremely jealous of you. I have kept several of the native Australian pseudomugil species and these are one I would love to own, but they are just not available here.
Thanks everyone. I actually got them last Saturday when the LFS was having a 25% off sale on everything. Besides 2 male forktails I had as a kid these are the first rainbows I've kept so I'm pretty excited.
As for the vals, I find that they're pretty much indestructible as long as the tank's large enough. The tank that photo's from is 20" tall. In my smaller tanks I find that the vals tend to be smaller and thinner. Otherwise they're pretty nondemanding. The kind I have are jungle vals if that helps.