Tori Bergquist posted a thorough review of Call of Cthulhu D20 which was released earlier this month. According to Bergquist,
Well, now I have it, and I have to say I am most impressed. The D20 system still necessitates some changes in approach, and that’s what I’ll emphasize here, but overall, CoC D20 is going to make a lot of people happy.
…Even at $39.95, Call of Cthulhu D20 is worth investing in if you are a hardened D20 fanatic and want some real meat to add to your D20 games. If you have never been fond of the D100 system from Chaosium, you might find this book preferable to their system.
I haven’t bought a copy yet, but the book looked very slick and professional, though the audience is clearly limited by the almost $40 price tag.