Well, it's been a while since I updated it, but the release of Rogue Trader has seen a need for me to look at it again. The supplement Something Other Than Human, describing Ogryn, Ratling and Squat player characters in Dark Heresy, has now been updated to include a little information about using those characters in Rogue Trader as well.
As with all my work, it can be found at the link in my signature, below.