Using Cisco / LInksys SLM series switches for 802.1q trunking and QOS.
Use a USB based headset for more predictable sound for VOIP softphones.
ICMP is actually very useful, sometimes required for things like MTU path discovery or in other words making the packet small enough to fit through all the devices between one end and teh other. Especially important to frag before getting encapsulated into a VPN because if the packet is too big after being encapsulated it will simply be dropped.
GoDaddy SSL Certs don't work with Palm OS / Versamail