¹ http://www.galaxyzoo.org/

² http://stardustathome.ssl.berkeley.edu/

³ http://www.climatewatch.org.au/

⁴ http://boinc.bakerlab.org/rosetta/

⁵ Cultural aspects to be taken into account occur at different levels: societal, personal, organizational and disciplinary.

⁶ http:/www.ted.com/talks

⁷ The drawback of the Network Effect is the risk to become ‘locked in’ to a product.

⁸ Openness is indeed one of the main characteristics of the Web 2.0 and is a prerequisite of the collaborative paradigm.