Received this offer through the post yesterday, not sure what people make of plusnet but it sounds like a decent deal to me.
Sign up for 12 months line rental at £11.99 per month with free evening and weekend calls (or add £3.50 for anytime) and get the value broadband service free for 12 months (worth £6.49 a month).
Free activation and wireless router (£4.99 p&p)
Sign up via http://www.plus.net/bundleoffer
and enter promo code 'bargain' at the payment stage.
It says it limited to the first 5,000 sign-ups.
Could be a good offer for some or use it to negotiate a better deal from your current provider like i did :)