not exactly sure what you want to do, but the plugin has a couple of template functions that you can use to display info in the sidebar, widget or anywhere else you can use a template function…

see:  http://codex.simple-press.com/codex/plugins/our-plugins/available-plugins/plugin-mentions/

Yeah! is that… but.. i would like to include a button so you can clear the notifications… so it will be a notifier of mentions…. 

i suggest the adition of that option

what kind of notifications are you using for mentions???  you can already do in forum notice, pm or email…  or none…  but the template tags should already be integrating with those…