if you want to do something really cool (and be a trend setter!) I think a good language to look at is GTK-PHP, it GIMP ToolKit for PHP,
enabling you to make graphical applications with the powre of PHP scripts.
http://gtk.php.net/...
the applications you make will work on windows machine linux machines macs... (because PHP has cross platform ports)...
you'll also be able to connect to al databases etc to make applications.
the applications you make will also work really well on PDAs, simply because PHP has such a low processing overhead.
Certianly embedded Linux is taking of really well since Redhat started developing embedded kernels and applications, (what I'm saying is learning a microsoft specific language is not really going to give you a very broad scope)...
Besides which the most popular embedded OS isn't Microsoft Pocket PC it's Symbian (which is used on most PDA phones as well as lots of pocket organisers). You also have to consider there is Palm OS, and embedded Java OS's using J2ME...