Can I add a widget to sidebar that's admin-view only?

I have a new blog, and have a few little things I’d like to have on my blog (like PR check, feedburner stats), but not have the general public able to see them until the number is higher. Is there a way I can add a piece of code to the blog that does an ‘if user=admin then show’?

I’m going to look around for that type of code but posting here in case someone knows the answer before I find it. Thanks!