Warning: Found enabled inetd service: /usr/sbin/vmware-authdResearch indicates that these particular warnings are spurious--I know I have VMware running, and the others seem to be facets of the way Ubuntu is constructed. To suppress them, I added the following lines to /etc/rkhunter.conf:
Warning: Hidden directory found: /etc/.java
Warning: Hidden directory found: /dev/.static
Warning: Hidden directory found: /dev/.udev
Warning: Hidden directory found: /dev/.initramfs
Warning: Hidden file found: /dev/.tmp-2-0: block special (2/0)
ALLOWHIDDENDIR=/etc/.java
ALLOWHIDDENDIR=/dev/.static
ALLOWHIDDENDIR=/dev/.udev
ALLOWHIDDENDIR=/dev/.initramfs
ALLOWHIDDENFILE=/dev/.tmp-2-0
INETD_ALLOWED_SVC=/usr/sbin/vmware-authd