I'm taking part in a free sample session of I Believe in Magic, which is run by Joy Holland from Facets of Joy. What happens is that you receive a daily email prompt and then you can go and take a picture relating to the prompt and share it in a Flickr group (specially created for I Believe in Magic) if you want to. The session lasts two weeks (from 13th July to the 26th) and registration is open until tomorrow (15th July). Here's the link: http://facetsofjoy.com/i-believe-in-magic-free-summer-sampler/
We're on the second day today. If you want to post your photos you'll need to create a Flickr account, which won't take long and if you already have a Yahoo account you can join really easily (it must be linked to Flickr).