BBC streams work fine on mine, but /only/ the low quality version (it's labelled "standard quality - below 256k").

It's the player on the 770 not supporting above a certain bitrate.

Those of you who have already made the choice of using the broadband version will have a cookie on your 770 telling it to always go for the that stream. You'll have to find the link on BBC to change your preferences, or clear your browser cookies. The link to change preferences is at the bottom of the stream page and it's called "Change how I view or hear this".