Let's face it: even if Alexa is not a good measure, it still shows interesting data. Forum members note that YouTube now has an Alexa rank of 3, which beats out Live.com and MSN (ranking 4 and 5 respectively).
Do you suspect that the numbers will change? Who will be #1 in one year (currently Yahoo)? People are already putting bets on Google.
Forum discussion at DigitalPoint Forums.