Marketing your book with no cash, contacts or help

Since Bat Boy was published a couple of months back, I've been wracking my brains on how to promote the damn thing. I seem to be stuck in a marketing limbo. Bat Boy was published by an independent publishing house which doesn't have a budget for promoting their titles, so the responsibility lies squarely on my own shoulders. Unfortunately my own marketing budget consists of a plastic container full of 5p pieces.

Browse the web and there are tons of websites that are happy to review and promote indie ebooks, but Bat Boy is paperback only - sending out review copies is bloody expensive, so I have to be really selective. But the big boys (regional newspapers and national mags) almost exclusively review the 'big name' paperbacks, sent in by the major publishers. Short of stalking Richard and Judy, I'm a bit stumped on how to get decent coverage. I've tried all the same, but have experienced Torres levels of success so far.

I've contacted and done interviews with local papers, but need more coverage to start selling copies. Even my charity appeal, donating 25% of my royalties to the RNIB, doesn't seem to be helping. So, has anyone out there had a paperback published and managed to successfully promote it, on a tiny budget?