Try these useful sites:
Look to the Stars: documents interactions between over 2000 celebrities and 1600 charities. Largely US focussed.
The Daily Activist: offers more celebrity and charity news.
Ecorazzi: Celebrity news with an environmental theme.
Imaging famine details changing representations of famine in the media for over one hundred years and aims to provoke debate about the effect of such photographs on our understanding of the majority world. It has a number of useful interesting sources and the blog is also interesting.
The Celebrity Culture Conference of 2005 organised by Philip Drake and Andy Miah, including a rich page of press coverage and blogs.
Charlie Beckett’s Blog at Polis, a research/debating forum on journalism and society at the LSE. Charlie is the Director of Polis and his blog is full of up to the minute comment on news and journalism with a great deal of readily searchable sense of celebrity and development.
The anonymous Charity Celebrity blogger comments on more general interactions between charities and celebrity.
The Boston Review provides a useful discussion of the practices of ethical consumption that a significant element of celebrity communications advocate (and constitute).