Not CentOS 5, as I have found out. Looks like upstream dropped w3c-libwww-* which is needed for jigdo ...
I'd seen that in dag's logs as well... was wondering what happened to it. So the package was dropped? oh...
Looks like this should go into extras then. I'll take a look at it and see if it "just builds" on CentOS 5.
This as in w3c-libwww-* I assume :-)
That'd be cool, Maciej