This will probably be my final update (v1.5.1, binary, source) on this project for a while unless other bugs are found, or enough interest is generated on a specific request by enough people.
The problem with window raising/lowering in KDE is now fixed. GTK/GDK was not acting how it was supposed to in regards to focusing and changing window Z-order (gdk_window_lower/gdk_window_raise/gdk_window_focus/gtk_window_present) and I had to add a very hack-ey solution to get it working in both Gnome and KDE. It’s not a pretty or elegant solution, but it works. It also still won’t give focus to the Buddy List window when it is raised in KDE, but I feel the end result is close enough for government work.
I’m going to go ahead and announce it today by adding it to the Pidgin plugin wiki :-). I’m finally interfacing with the rest of the open source world, yay! XD
Oh yes, I forgot to add something on my last update post. I originally had planned to also add an option so that double clicking the taskbar/docklet icon would always open the Buddy List instead of toggling visibility. This was unfortunately not possible due to how Pidgin is programmed. I found exactly where the problem was, and know how to fix it by modifying the Pidgin source (probably by generating a signal for an event), but I am not really interested in trying to get a patch pushed through for that on Pidgin, so alas.