Hi folks,
I'm one of the Wine (http://www.winehq.org) developers, and I just managed to build Putty under Winelib. That is, Putty now runs as a native Linux application.
The interesting part is that I've managed to do so with virtually no changes to the source code, just a few changes to the makefile.cyg file.
Now, my question to you: are you interested in supporting Putty under Wine, as a Winelib app? If so, I can clean up my changes, and send you a patch for the build system to incorporate in your tree.
BTW, the resulting executable is about 500K, so it's not that large, compared to the Windows one at 360K.