Several months ago I had to choose a WikiWiki system to use at home.
I've reviewed some and I was discussing at #modperl (on irc.rhizomatic.net) why do Perl programmers don't care more with the UI?
I chose Moin. Why? It was more pleasant to use and to read. What you see at my home is it's default installation. TWiki's default is not pretty. Is not pleasant.
So, Perl programmers, please, worry more with the UI. I know we can do better. We can get more users and programmers to the light side of the force if we have more pleasant things.