The should be the last experimental release of dhcpcd-4.99 as the last feature I wanted is now in- ARP ping support. This is handy for mobile sites that require a static IP. You can configure it like so:

interface bge0
arping 192.168.0.1

# 192.168.0.1 exists on more than one site
# so we differentiate by hardware address
profile 00:11:22:33:44:55
static ip_address=192.168.0.10/24
static domain_name_servers=192.168.0.2

# All other profiles for 192.168.0.1
profile 192.168.0.1
static ip_address=192.168.0.20/24
static domain_name_servers=192.168.0.1

This now means that dhcpcd can replace the all the interface configuration modules in Gentoo baselayout and OpenRC. This means we can move the link management modules into proper init scripts, which is where they really belong.

So, get testing it and report back any bugs, even compile warnings :)