[alxndr]

Here's a guy who's in the TdF right now: http://app.strava.com/pros/laurenstendam

On individual rides (e.g. http://app.strava.com/activities/66583736 ) there's a chart below the map which you can switch to show "Performance", check the "Power" checkbox and you'll see his watt output. Looks like today he cracked 1kw momentarily about ten times, and for an hour starting around ~1h30 in he never went below 200w.