Every time i log on now i get some annoying music start playing , anyone else? Whats it for?

Most likely a flash advert.

Its infuriating - how can you  turn it off?

Do Cannondale really believe that I am more likely to be well disposed to or more likely to purchase their products by irritating and annoying me? I can assure them that this ad is having a very negative effect upon my perceptions of their company.

Made me watch it though to see what it was which I suppose is what advertising is all about and the fact that it irritates you makes you remember it which again is what advertising is all about

yes - but once is enough. I know advertising is supposed to work at a subliminal level, and that just the fact that we are discussing this is supposed to be a measure of the campaigns success, but I believe that once one becomes knowing, and appreciates the games being played such advertising can be counterproductive. Maybe now  I think (and react subliminally too) -  Cannondale - pain in the ass.

Yes but you are aware of the brand whether in a bad way or a good way therefore raising the profile and achieving the objective