I have two questions :
1) If I install this plugin, does WordPress still issue pings every time I update or create a post? In other words will I end up with both types of notification going on, on my WordPress site, and if so is this a problem?
2) If I use pubpubsubhubbub on my site what does it help me to get my posts indexed in the search engines, or can it only notify those listening for my posts already? I am confused about who will receive these push notifications and how to set it up so that Google gets to hear about posts.