I remember hearing about this on the radio news, but have just discovered a piece about it in the Guardian.
Researchers at Manchester University tried bluebottle maggots on patients with MRSA-infected diabetic foot ulcers and found that in all but one case, the infection was cleared up.
I couldn't find the published research that led to this article, until I found the University's own press release which made me remember the first rule of literature searching for authors: can the author be spelt some other way? The Guardian has him as Bolton, but he is in fact Boulton, and the press release cites the publication.
The Guardian does report that the Manchester team has been given a grant by Diabetes UK to run an RCT on this.