If your 4od icon is missing, go to your Account Information and Billing details, enter your password, cancel and go back to the XMB.
4od icon will appear. Had this last night, I had the ITV player icon, but no 4od. that fixed it for me.
On another note, didn't think much to it TBH. It stuttered at times, then I was watching a show on 4od and half way through told me not enough memory and I had to quit the browser.
Sony need to update their browser and flash player if you ask me. Stll, nice idea if it does work.
I can't get BBC iplayer to work correctly either. Seeing as I changed my HD to a WD 500GB there is apparently a fault that causes the bbc iplayer to skip and pause badly with these user fitted drives..
oops.. Oh well, still got my laptop for catchup TV.. lol