We've created 2x unique niche content sites for the purposes of getting highly relevant IBL to our main site (PM for URL's). Since we own these 2x contentn site I can obviously have as many or as little OBL pointing to our main site; how many should I have? How many are actually "counted" in the ranking algo? Right now I only have two (1 word) OBL per page pointing to our main site. Any suggestions?