Thank you for your helpful answers. What I did want to ask was if I should put the word "phpbb" for exclusion or the actual name of the folder on the site which is "forum". I beleive it will be the latter as the generator would not have access to the DB tables which have the pre-fix PHPBB.
Also, I found a section for inidividual attributes which is very interesting. Is this where I can assign priority and frequency for each folder on the site? It would help if you could just do a sample for me looking at my site.
define specific frequency and priority attributes here in the following format:
"url substring,lastupdate YYYY-mm-dd,frequency,priority".
Is it safe to ping all major blog directories on here? Is this were you define to ping google and yahoo as well?