It's all down to people willing to post news stories etc for the front page.
Because there are so many sections because of the number of devices you will find that only a few like the Samsung Omnia sections are busy and most people tend not to explore the reset of the site as they used to in the old days.
Android is a busy part of MoDaCo and it's where Paul generally spends his time so WM is slipping.
WP7 will hopefully bring this side up again and it certainly has potential just need to get the front page going again.
The community is a completely different beast now with ROM creations, before it used to be about homescreens, creating apps or fixes and general day to day questions. Now if you get a problem it's flash this or that ROM rather than try this app or registry entry etc.
How times have changed........ But I'm still here
And we still have pleany of people visiting, for example at time of post we have 2695 users active in the past 30 minutes