I've not had any problems exporting smooth skinned skeletal animation to .x from Maya 5 using the plugin I got from highend3d.com (and I verify the model works by converting to b3d using Ultimate Unwrap and then playing the animation in Blitz3D!) If you are already using that export plugin then I assume you are doing something incorrectly because, like I said, it works great for me.
As for "I think for the Blitz men to ccheck out that thing," I'm guessing you mean that Blitz should support .x with skeletal animation. That makes sense, however Blitz is based on DirectX 7 and skeletal animation wasn't added until DirectX 8, so I imagine there's some issue there with supporting the DirectX 8 file format. Of course, this makes me really curious what's happening with BlitzMax.
As for "I think for the Blitz men to ccheck out that thing," I'm guessing you mean that Blitz should support .x with skeletal animation. That makes sense, however Blitz is based on DirectX 7 and skeletal animation wasn't added until DirectX 8, so I imagine there's some issue there with supporting the DirectX 8 file format. Of course, this makes me really curious what's happening with BlitzMax.