Forums available from different URL's

[popovod]

Hello:

I'm planning on having a site that uses vBulletin for the forums. There will be several categories and forums under those categories. So this site will be considered the main source for all categories and forums that will be created.
Now I would like to create several other feeder sites that have a vBulletin forum on there as well. On each one of these sites I would like to integrate one of the categories and related forums from the main site. So anytime that posts are made in vBulletin on these feeder sites it's also being posted on the main site. Would this be possible through vBulletin through either RSS or the API's or some other method?
Would I also need to purchase a another vBulletin license for each of these other sites?

Thanks

[Steve Machol]

Yes, those would require separate licenses.