What are you supposed to do with an http server after getting one quickly? Stare at the open port? The only thing quick about SimpleHTTPServer is the startup time. Don't actually try using the server.
The specific instance that put me off of the python servers was when a friend downloaded a CableGate tarball and someone else wanted to look at it. No one had a flash drive on them, but the fellow did have python installed. One SimpleHTTPServer later and the tarball was being transferred at 100KB/sec, slower than the original download. The cables were all html anyway so let's try uncompressing the tarball and serving those. Now the server would time out instead.
What do people actually use SimpleHTTPServer for?