HLPS's audio-drama of At The Mountains Of Madness, and working on a Savage Worlds/Realms Of Cthulhu conversion of WildFire's Lovecraftian hard science fiction setting for Mongoose's Traveller: Chthonian Stars.
While I've certainly dabbled in conversions in the past, this is the first time I've really been serious enough to commit to one that I intend to make available online. At this time, I'm working on character creation and not hitting any snags... yet. Most of the Advantages/Disadvantages found in the original rules already translate well into existing Edges and Hindrances. I need to figure out if any new Skills would be needed. (Yes, Guts will be an available--and recommended--Skill.)
After that I'm going to have to start converting weapons and equipment into their Savage Worlds equivalents. Then I'm going to have to gen-up stats for the various new creatures NOT found in Realms. The hardest part will be trying to convert the various spaceships from their ori stats (if you've ever played Traveller, you know what I'm going up against) to SW. Fortunately, I've got the old Sci-Fi Gear Toolkit to help me. Once I got that done, I'll layout everything out on my Mac into a nice .PDF and post it... somewhere.
Stay tuned, Savages.