If these pages have inbound links pointing to them, then combining this may give it a little kick up the rankings. Think to yourself why you'd want to include these pages under only one page. Are they not strong enough on their own? Do they have very little content etc.

If so, then it would be an idea to combine them, and the others should be 301 directed (which will preserve 90-99% link juice) - Source: http://www.opensiteexplorer.org/About

This will also mean that you have created pages with 3x as much content on them, which will stand up to higher competition and attract more long tail searches if done well.

Regards

Aaron

I think you have answered your question already. This comes down to price over SEO value. Sure, the perfect pretty URL's would add something to the product and category listings pages, but depending on the competition in your market and the ongoing budget for Link Building this may not be an issue if you're on top of it all.

If you'd rather outlay a little more cost upfront, then it might be an idea to get it 100% from day 1

Hope this helps!!

Aaron

KB's are great for user generated content (just look at this one). If it was open to all just imagine how many links it would be attracting!!

Obviously your KB would be for SEO benefits, and therefore the best method for gaining from it would be to host it on the clients domain in a sub folder. Most open source CMS's can easily be modified into Knowledge bases with relative little ease - one thing I should recommend is heavy moderation on all posts to ensure that no incorrect answers or spam goes live, as this would make their business look poor.

Regards

Aaron

You're correct in thinking no link juice can be passed through an iframe. You could however have a link immediately before or after it in the method you mentioned, and then give your partners the whole HTML including that link.

Hope that helps!

Aaron

There are so many site, tools and 'solutions' like this on the web nowadays - and too many people seem to be buying into them.

The only true way to gain good quality links is though EARNING THEM. Instead of spending time indexing poor quality links via RSS feeds and such like, spend your time creating something link worthy - something people will want to link to, such as the Social Media Guide. It ticks all of the boxes, it's from an authorative source, includes badges (for link backs), and it's easy to syndicate.

Whatever your niche is, someone somewhere is looking for a review, a buying guide, or a 101 ways to... list. I know I'd personally spend my time following these methods.

@Shehzad - This isn't meant to be aimed at you in particular! This is just my strong recommendation to all employing these tactics to swap to more natural SEO

Aaron