We are all familiar with the famous Blogging Community MyBloglog (a Yahoo! Service). Along with many features it has, it offers a widget you can place in your blog template to track your recent visitors (MyBloglog Users) and show them off as well.
This widget can be found at your Widgets page of your Community as the Recent Readers widget. The code you need to copy and paste is nice and short. It renders beautifully and exactly as the sample you see while customizing it. The problem is with the RTL pages.