Jailbreak worked here as well.

On a device (serial number prefix) it already was confirmed working on.
I used
Code:
sudo python -m SimpleHTTPServer 80
on OSX btw - no problems.
If you are by any chance using tomato on your router, just use
Code:
address=/a/192.168.x.x
as a Dnsmasq Custom configuration under Advanced / DHCP/DNS
replace 192.168.x.x with the IP address of the computer running the port 80 server.
Also dont forget to manually type ;fc-cache in the searchbar, when the task bar tells you to. Stumped me the first time...