Clicktivism – can logging into a website and adding your name to a petition really change the world of art?

For many hoping to see their work placed in the public sphere, the easy route seems to be an approach of "play-play".

A new sculpture that neatly aligns commercial interests with art and our history has the twitterati frothing about apparent opportunism.

A man-made rainbow, comprising simply sunlight and water, has popped up in Cape Town.