I'm less concerned about x86_64 for Beta, but i686 not fitting on a CD is a stop ship. We're 43~megs over size. That's not a small amount. This may have been brought up before, but I don't see archives of it so it may have been IRC only.
http://jkeating.fedorapeople.org/alpha2beta-live-diff has a listing of the package differences between Alpha and Beta. I would really appreciate some help looking for something to cut for size, since you guys are supposed to own this config now.
http://git.fedorahosted.org/git/?p=spin-kickstarts.git;a=blob;f=fedora-live-...
http://git.fedorahosted.org/git/?p=spin-kickstarts.git;a=blob;f=fedora-livec...
and
http://git.fedorahosted.org/git/?p=spin-kickstarts.git;a=blob;f=fedora-livec...
are the configs used.