This deal is back again, same as 3 months ago. I missed it last time, as the quidco only stayed at the £150 level for 2 or 3 days (I think).
Nokia 5800 Racoon £30 (£27.41 online direct with Orange) x 12 months.
200 mins + 300 texts + 200 mins to landlines
Effective monthly cost=£15.24 [if Quidco pay the £150 cashback; phone delivery is £3.99]
Free evening and weekend mobile internet browsing is for only 2 months on all the orange contracts at this price, so I think the 12 month contracts work out better than the 18 month ones.
Thanks to Howdie for pointing out that (until the end of the 24th) this deal is also available with a free Altec Lansing external speaker. See his post (with a big picture of it) in the thread below.