erc kind of notification on wl

Hi Guys.

By default when new mail arrives. wanderlust rans ding.

An explanation about erc behaviour:
--8<---------------cut here---------------start------------->8---
Sometimes When I am out of reach of my workstation and something happens
on one of the irc channels I got a notification on modeline about
it. Then when I visit that buffer the notification on the modeline is
dismissed.
--8<---------------cut here---------------end--------------->8---

Have somebody implemented something like that on wanderlust?.

Probably it should be related with the Folder
{buffer}. wl-biff-notify-hook should trigger the notification on modeline
then when user visit Folder or summary {buffer} notification should be dismissed.

Best Regards