How are filesystems mounted in Lion? I posted a question a while back regarding network mounts.  But I have a more general question. If Lion no longer uses /etc/fstab how are standard mounts in addition to network mounts handled? I would like to be able to customize this.  For instance how is root mounted and such? Also for instance, how is removable media mounted?
I know this is probably a bit late for your uses, but my understanding is that this is determined by the file /etc/auto_master. You should read auto_master's documentation here or running man auto_master in the Terminal.