I was just thinking about that bit, whether the Conan book is required - I'd say no, unless you're playing a Scholar, in which case you really need to have the book. If you're just playing a warrior-type, it's not as important. I don't really want to out-of-hand limit people's class choices like that, but like Karl said, the whole thing of Conan magic is almost completely different than standard DnD's.
I'm probably going to go with a Conan game. I have my notes on the setting worked up and all that, I just need to actually start planning and plotting the adventure. It'll probably be set in Ophir, BTW (I was toying around with Nemedia/Brythunia, but changed my mind).
The order of voting fits well with what I wanted - after Conan, Dark*Matter was my second preference, followed by 1890s. Depending on how time goes, I might still run the Dark*Matter, as well.
Hopefully within the next few weeks, you'll hear more on this. Thanks for voting, everyone!