This is back in stock at the Orange shop. Use "Wincanton" as company name and voucher code "OPOSO" to get this price.
£20 Top up is mandatory but still a decent price for this great little 2 megapixel camera phone.
By the way if you want to go through QuidCo, open another browser window log in and then click through the orange link. Then copy/paste this link ...http://shop.orange.co.uk/shop/show/offer/exclusive_discounts?WT.mc_id=ora06077_un_01
...into the address bar and it will track as normal.