Please keep in mind when doing this to NOT cross post across multiple categories
when you cross post what that does is publish the same content in 2-3-4 categories, so say I had a blog and wanted to use your blowjob, teen and hardcore category feeds, and I placed the individual feeds in my rss software, it would publish the same articles 2-3 times
for instance, I am using a cashmaniacs free hosting account to start a new blog using their feeds here -
http://sex-blog.outsidefuck.com/ - but they cross post into multiple categories and it posts each post multiple times
anyway, just something to think about