Yahoo Share

Hy there..
I need a plugin, similar to Tweet this and Facebook Share Button that will do something like this..
Well in the 1st place it needs to have options to put it where i want..
after the post, before the post, on pages
left side, middle, right side..
css editing.. etc..
and to have Yahoo! icon ??
so what i want it to do ..
if an user clicks it.. he should have 2 options.. he needs to login so he can send a mass message with the link of the post/page/site and the message can be edited..
next to the Name Post – Link Post.. should be a message.. ?? a default one ??