Since all Keirin bicycles are, by regulation, more or less identical, the porn thread would have sufficient of them if only one had ever been posted :-)
Hah, kinda have to agree, most keirin frames I've seen are only separated on how good the paint job is. At the end of the day, IMO, what makes a bike porny depends hugely on it's paintjob > components used > rarity > geometry > brand
The other side of this argument is that there is something aesthetically pleasing about seeing identically specc'd machines neatly lined up, if you consider bike p0rn to be about composition as well as the subject.