The most mature ports of our toolkit (wxGTK, wxMSW and wxMac) are nearly equally advanced in terms of features. The development on them is "easy" - they all have the same screen sizes, keyboards, pointing devices, and sounds so once a wrapper around their native API is in place, the ports can share a common wxWidgets infrastructure for events, placement of controls etc.
A few releases earlier we started work on a new family of ports that are increasingly demanded by the market: handhelds, phones and PDAS. See more about it at http://wxwidgets.org/docs/embedded.htm
wxWinCE is the name given to wxMSW when compiled on Windows CE devices. We have a dedicated section in our manual about this port, see: http://www.lpthe.jussieu.fr/~zeitlin/wxWindows/docs/wxwin_wxmswport.html#wxmswport
Are you a wxWinCE user? What do you miss most? When and how do you use #ifdef __WXWINCE__ in your code? Do you have some own improvements to this port? Please share any opinions and findings about the current state of the wxWinCE port on wx-dev and (for bugs and patches) the SourceForge trackers, and let's make it better together for future releases.