There is also IRC channel for Enthought open source software: #enthought-dev on chat.freenode.net.
If you have questions specifically about the Chaco package, you can ask them on the Chaco-users mailing list, which is lower in traffic than the Enthought-dev list.
Additional information about some Enthought open source projects is available on the Enthought wiki, which is integrated with our issue tracker.
Information about the Enthought Python Distribution is available on the Enthought website. For common questions related to EPD, see the EPD FAQ. If you need further support, consult the epd-users mailing list.