[pubsubhubbub] Pubsuhhub implementation in php:

[jits]

Hi
This is jits .I am trying to implement a pubsubhub for our website
blog system.I searched on net about the pubsubhub specification n
implementaion,so i came up with googleapp engine and feed burner.I
have difficulty in implemntating our own hub for the blogging system
as i m new to this.Has anybody implemnted the pubsubhub using
wordpress plugins and php.?
Please help me.