Was in Toys R Us today in Cardiff and noticed that all the Guitar Hero 5 Guitar Kits (game +guitar) came with a free copy of Guitar Hero world Tour for the same platform. For example Xbox 360 GH5 kit was £65 and free world tour game worth £39.99 (but available for about half that elsewhere). Was across all big platforms PS3/Xbox360/Wii I think).
Seemed like a fairly reasonable deal to me.
OK - just seen the Amazon deal for a £1 less but still not bad.