apmd – power management daemon used mostly for laptops and green machines.
atd – related to crond, used to execute things at specific times.  I had nothing scheduled.
autofs – typically used for automatically mounting removable media and network shares.
avahi-daemon - registers local IP addresses and static services using mDNS/DNS-SD (zeroconf)
Bluetooth – Are *you* using Bluetooth?  
cpuspeed – responsible for adjusting processor speed dynamically, disable unless using a laptop
cups – Common UNIX Printing Solution, chances are you won’t requiring printing functionality
firstboot – responsible for detecting hardware during the initial install
gpm – responsible for allowing mouse functionality in text-only mode
hidd – Bluetooth HID daemon
irqbalance – this can be safely disabled if you do not have an SMP kernel or system
kudzu – if your hardware configuration is static and won’t change, disable it
mcstrans – translation daemon used by SELinux.  Previously had partial DDoS vulnerability. 
mdmonitor – responsible for monitoring RAID arrays 
microcode_ctl – updates the microcode on Intel CPUs
nfslock – handles file locks on NFS, NFS is disabled by default
pcscd – handles Smart Cards and cryptographic tokens 
portmap – NFS file sharing over TCP/IP networks
rpcidmapd / rpcgssd – Network File System Daemons