Rather off-topic, but I'm looking for IP-based KVMs (~16 ports) that can handle both PS/2 and USB hookups on the server side. All of the answers over at Slashdot are a few years out of date and it looks like prices on KVM head units have dropped a bit over the years.
Some of the older units only worked with Windows, Internet Explorer and ActiveX. Others like the ATEN KH1516i supposedly use Java and are far better from a cross-platform point of view.
I'm on the fence about the CAT5 cables over the more traditional style, it seems like the CAT5 cable system would give a lot more flexibility in dealing with USB vs PS/2 servers (or even serial only?). The bigger advantage with the CAT5 stuff seems to be fewer length limitations and less space used in the rack for the head unit.
I'm guessing that the CAT5 adapters are going to be proprietary?