I just released version 1.1 of WordPress Users. If you are upgrading from a previous version, please check your settings, as they have changed. Avatar and user description display are now optional, so you must enable them for them to show up. Also, user description character limit can now be changed, so check that setting as well.
I just implemented open registration on this site. You should be able to login or register from the sidebar. I also launched Kempwire Forums. The forums are mainly for support of my WordPress plugins, and the site registration is mainly for the forums. If you register on the site, you can use the same login for the forum and vice versa.
Update: the forums have been taken offline for the foreseeable future.
For support of plugins, I am leaving comments open on the plugin pages for now, but I appreciate it if all discussion will be added to the forums. Please let me know if you have any questions. Thanks!