I'm setting up a WordPress server, with lighttpd, mysql, php that would need to serve only couple of hundred of hits a day. It would be running on a Xen-based VPS with 128 megs of RAM.
The question is, what operating system would be best for the task? The choices are NetBSD, Debian, Gentoo, Fedora 14 and Ubuntu. Currently the server runs on Debian, hitting the swap notoriously. I'm thinking about NetBSD (Would prefer FreeBSD if it was available, NetBSD seems less friendly).
Also, I'm open to suggestions regarding the rest of the setup, like database choice.