This could come in handy: showoff.io is a service that creates a temporary or permanent public URL alias which will tunnel to your localhost.You can map to a general port or a particular vhost. You can even use a DNS CNAME forwarded to a permanent share.io URL, giving you a static name which always points to your machine, even if you switch networks. There are specific instructions for using it with a local WordPress install, working around WP’s canonical URL redirection. Oh, and it works through any firewall that allows outgoing ssh (port 22) connections. I could see this being useful for very quickly setting up/tearing down temporary demos for web development clients.
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