Additional note: A broadcom-sta package has now been added to the Slackbuilds Repository. (It also appears that a patch is no longer necessary for the 2.6.29 kernels. I haven't tested this though... unless I upgrade kernels I'm leaving this alone.)
(Note: onebuck pointed out in the Slackware forum that Broadcom provides a patch for kernel 2.6.29. I had been having trouble finding the correct patches, so I was using the patched Debian source. That's pointless now, so I've deleted the...