This looks to be a pretty good deal to me from three at the moment.
Their VT750 tarrif which is normally £35 a month is on offer at the moment. They are also offering the new Nokia 6600 slide for free on this tarrif if you sign up to 18 months.
Very good value if you need a new phone and looking for unlimited texts.
Good quidco sign up also with this deal. Might suit someone.
Click on the texter plans and you will see the discount offer, then select Nokia 6600 (FREE) phone and you are there. Dont forget £20 voucher and Quidco too. Pretty good deal!