The activeRollers section of s l a m's activeRoll (bottom right of the home page) is expanding day after day. Great :-)
I'm tracking new adopters by checking the referers list. If you publish an
activeRoll and your site is not listed, drop me a note

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The real value of activeRolls will become more apparent with the next release of activeRenderer, which will support outline transclusion.
With this feature active, clicking on a weblog listed in the activeRollers section will actually expand the roll in place with the content of that site's blogRoll, building a seamless resource directory.