Dan Sabbagh writing in The Times about blogging and MessageSpace focuses on the possibilities presented by targeted advertising:

Six political blogger sites (the three on the right, plus Labour and Liberal Democrat sites) have done a deal with MessageSpace, the advertising network for bloggers. Theirs is the perfect audience for lobbyists, for example, as MessageSpace can target advertising depending on where the reader comes from — a lobbyist’s ad can, for example, be viewed only by those who come from the Downing Street servers. The bloggers are hoping to make a few thousand each a month, enough for the bills at least.