wxDC now runs in Linux using GTK. I spent a few days compiling against wxGTK 2.5.4 and changed all needed source. Downloading the latest version from CVS should allow you to compile on Linux (use top-level Makefile) and Windows (use MSVC 6.0 project files).
Please submit bug reports, as I know there are weird GTK glitches that pop up. So far, however, the only problem Ive noticed is that the hub tab buttons (prev, next, close) do not display (EVT_PAINT is not being issued for some reason).
After over a year of letting this project sit still, I finally have found a little time to do some work. My main focus right now will be to get this thing working on other platforms than Windows.
There has been a lot of progress since the first release, and a new one is coming soon with huge improvement. wxDC now supports transfers, private messages, download queue, UI config, user blocking, login/connection/preference settings, and user share browsing. However, only passive mode is supported.
The UI has been redesigned, which makes things much easier to use and more like DC++.