Hi Pamela,
I have just downloaded and installed the XDCAM Log and Transfer plug in for FCP7.
http://pro.sony.com/bbsc/ssr/micro-xdcam/resource.downloads.bbsccms-assets-micro -xdcam-downloads-XDCAMSoftwareDownload.shtml#apps
You are right, it doesn't show up in L &T preferences but it does actually work. It will log and transfer my EX clips into my project, but, will only convert to XDCAM EX codec, which is fine for me because I edit in this and render in Pro Res.
Remember you have to point L&T at the root folder containing the BPAV folder to be able to do this.
For the person who wanted the XDCAM transfer software, it is at the same site under "legacy XDCAM applications"
DM