This is awfully close to what I picture in my head when I talk about the flowers from Cattleya alliance crosses, even if the lip is not all that frilly. I'm especially pleased with the light purple lines down the center of the petals and sepals: it's a nice touch. I'd like this a lot less if the petals and sepals were pure white.
I did Google, but didn't come up with a whole lot of interest about this one. Two sites sell it: one site sells this plant in Canada for $30 Canadian, plus $10-20 shipping; another site sells the same plant in the U.S. for $17.50 plus $10 shipping plus maybe more; it's kind of unclear how the shipping works on the second place. The flower is supposedly very fragrant, but I wouldn't know: this was eight months ago, and I couldn't get close enough to most of the flowers in the show to detect a fragrance.
The parentage is Laeliocattleya Memoria Robert Strait x Cattleya walkeriana; I couldn't find the parentage of Lc. Memoria Robert Strait, though I also didn't look very hard.