I'm still planning to survey various scaling papers here, but due to teaching and other obligations, I have to put this project on hold until April (I'm off from teaching starting end of March). In the meantime, you might find the following very recent article interesting: Stumpf, M. P. H and Porter, M. A., Critical truths about power laws, Science, 335, 2012, pp. 665-666. Here's a link to it:http://www.sciencemag.org/content/335/6069/665.short
This link requires a subscription to Science -- sorry, I couldn't find any non-subscription links to this article yet.