Sierra has released Dynamix's Red Baron 3D, the latest in the Red Baron series, which adds 3D hardware acceleration through 3Dfx's Glide API, support for up to 64 multiplayers, 22 flyable planes, and it sells for US$39.99.
If you already own Red Baron II, you can get a 100-percent rebate if you purchase the newer title, or you can wait to download an extensive patch that will upgrade Red Baron II to Red Baron 3D.