lucy24 - 11:54 pm on Apr 24, 2012 (gmt 0)
Whew. Your subject header made it sound as if you were thinking about mapping the same content five different ways-- which would infuriate the user. (Or, at least, this user ;))
So you're thinking about five non-overlapping sub-maps so users don't have to plow past the four-fifths of the site that doesn't interest them? I don't see a problem, as long as there's a clear "back to top" option for users who say "Oh, wait, wasn't there something about widgets in this site?" Or links to "widget map", "gizmo map", "foobar map" et cetera, whatever is most convenient.
And you did say html sitemap, meaning the map for users. No relation to the xml sitemap that you may or may not produce for search engines' benefit.