Several people have emailed today to say they've found 2011 sets in online shops and in real ones too.
Supertoys.co.uk is listing the Star Wars sets but whether they actually have them, and in the UK is another matter. They are owned by superspeelgoed.nl by the looks of things, who always lists things early. (Thanks burakki62)
Commander-Cody found NinjaGo sets in his local WHS in Poole: "They had the starter arena set #2257, Cole (the Earth ninja) spinner set and one of the skeleton spinner sets. The single spinner sets were £9.99 and the starter set £14.99, although it had no price label. "
And, finally, veron4 found Series 3 minifigs in Fenwicks in Canterbury and bought a box of them.
So if you're venturing out this weekend in the appalling weather we have forecast, good luck tracking them down!