Has anyone heard anything about them
I can't find a website or anything
Tifosi is the in-house bike brand of RJ Chicken & Sons - probably the oldest UK bike distribution company. You can check the bikes out here http://www.chickencycles.co.uk/tifosi/ the whole range should be there, well you'd hope. There's a dealer listing on there too and you can buy them online at places like Wiggle and the like.
Couldn't find any recent reviews but I have had people review 'em the Audax and the CK7 are the two I'm familiar with - well thought out bikes. My personal view is that there a tad over-priced, but maybe I'm just tight.
Are they the same brand as the Tifosi eyewear?
No, they're an American company whereas Tifosi bikes are British
ahhhh, shades are up to the job. :0)