Here's the announcement, fresh from my inbox:

It will take a few days until all the related websites are updated, but the vote at the incubator has passed.

As Yonik puts it, it seems like Solr is just getting started.

Have a look at the mailing list stats below, this looks promising.

The solr-dev list is first, the solr-users. In blue the number of subscribers, in red the number of posts per day.

Congratulations to everyone involved in making this happen, I guess we'll have a beer at ApacheCon EU 07!