I have a site where Sitemaps are dynamically generated cos I use an awesome framework.
The framework also has a ping google method.
I'm thinking of pinging Google every time some-one posts something on my Forum.
Is this a good idea cos there might be multiple posts per hour or even per minute if the site grows big.
Also, I might not be able to figure out if the post is new or modification of an existing post.
Is it a good idea to ping Google when a forum post is modified?
Also what about replies?