Sgt_Kickaxe - 9:29 pm on Jun 30, 2010 (gmt 0)
The ideal link is on a page with less than 30 links
It's linear. The higher the value of the page the greater the number of outgoing links it can support. There have been examples of PR7 sites that had only one PR8 incoming link and that linked out to many other sites giving them all PR5-6. Loss to those sites didn't fluctuate as more and more were added to the giving site. While there was some additional loss the high value of the links reduced the effect of that loss. These examples don't last long enough to draw long term conclusions from, Google catches up to these rather quickly.