It's seems like a happening place. I have a bbc live video and I keep checking in out to see what's happening. It's at Church St and Kensington High Street and it's always full of double decker bus' and people.

Lots of shopping too I see. Which coffee shop has the best coffee? And any of them open late/24 hours?

According to a recent Which report,
Cafe Nero serves the the best value and tastiest coffee of the big high street coffee chains,

It was a very subjective report. Plus there is variety even between branches of the same chain.
For example, our local Costa is managed by an Italian and staffed by a team of very professional, cheerful young Polish women. So the coffee there is very good, atmosphere too, the local Italian expats gather there most afternoons, adding a lively, cosmopolitan note to what could have been just another suburban coffee shop. It doesn't feel like a typical chain at all. But I've been to other Costas that weren't nearly as good.
Most of the Nero outlets I've been to were just so-so, none as good as our "home" Costa.

Thanks Miss and BT

Giada from the food network is doing a show about london. How cool.

Right opposite the Ken. High St. tube station...Caffee Concerto. Great coffee , pastries and sandwiches!