From Wilensky' followup blog post (cross-posted to Jewschool), it seems that his decision is making quite a stir in some circles.
My conversion was at once both absurd and a practical necessity: absurd because I know that I have always been a Jew, and a necessity because of my increasing disinterest in the corners of religious Jewry where my Jewishness goes unquestioned. I wanted to participate fully in the ritual life of the synagogue I happen to attend. To do so honestly, I had to take the plunge.
Bette reichman, Forward.com
I'm personally not at all surprised by this turn of events. The Reform movement's decision to recognize patrilineal descent occurred in 1983, and Wilensky is part of the first generation of Jews to grow up after that decision. (For this reason I--and many others--find his decision to be a notable development.) A growing post-denominationalism among our generation of Jews--combined with a strong sense of personal identification with and connection to klal Israel across denominational lines--set the context for Wilensky's decision (and also explain why I empathize with him).
* formerly of The Reform Shuckle; now at davidamwilensky.com---as well as editor at New Voices)