1080 24p FCP workflow questions

I recently shot some test footage with the HVX200 using the camera's 1080/24pA setting. I'm attempting to establish a post workflow for a feature I will be editing that wants to shoot and edit at 1080/24 for eventual delivery as a 1080p BluRay disc.

The footage I shot was sometimes recorded to a CitiDisk HD recorder, and sometimes to P2 cards. I currently have all of the footage from both media imported into FCP v.5.0.4 on a Dual G5 PowerPC. My questions are:

1.) When I look at my clip properties, the footage appears to have a framerate of 29.97, rather than 24 or 23.98. Is there a way to work with this footage at "native" 24p - and what specifically would that entail?

2.) In FCP, there is no DVCPRO HD preset for 1080/24p - only 1080i/60 and 1080i/50. Am I supposed to use one of those settings or do I need to modify the presets to properly work with my footage.

3.) What is the difference between 23.98 and 24p? Is 23.98 interlaced? Which is better for eventual delivery on BluRay 1080p?

Thanks very much for your advice. Happy Holidays & Happy New Year!

- Jordan