Good argument blogman, but I don't think 1000 blogs will have the same content at the same time on their site (you can display a single PH gallery post or any other number)
Sure, PH RSS feeds should not the only content on your site. It's IMHO a good and easy way to get fresh and quality content for your surfers.
You can combine it with other RSS feeds too, so your website will be more unique the more combinations you choose.
Just my 2 eurocents
