@esmi: Thanks; much appreciated. I had searched the WordPress.org site but came up empty. Given that twentyten is current/new default theme, I had hoped it might somehow show up in the search results…
@esmi and @michaelh: thanks for the pointer to TwentyTen as a reference. I will look there. My question was really from the standpoint that I have a theme I’ve developed and it works fine under WP3, but to the extent it makes sense within the design of the theme, I’d like to make sure it supports WP3’s capabilities and isn’t using deprecated stuff. Menu support is a good example of something that it /should/ offer. I will give the source for TwentyTen a scan…