From tomorrow virgin will offer half price for six months as well as free installation. The website isn't updated yet, but have a read here for further info http://www.broadbandchoices.co.uk/six-months-half-price-broadband-from-virgin-media-011110.html
Looks as you should be able to get three services at £9.50 for 6 months. You can still get cashback via quidco/topcashback for £65. I think existing customers might be able to take advantage if they upgrade to tv xl, but not sure.
Website now updated.