I’ve taken the discussion of the power button and have expanded upon it in the form of an article on power management in Widnows Mobile devices.  I’ve published it at my favorite online dev community site, codeproject.com.  Go over to http://www.codeproject.com/script/Articles/Article.aspx?aid=28886 and take a look at the article.  If you find the information useful then please log in and rate it!