  We discuss the summation of certain series defined by counting blocks of
digits in the $B$-ary expansion of an integer. For example, if $s_2(n)$ denotes
the sum of the base-2 digits of $n$, we show that $\sum_{n \geq 1}
s_2(n)/(2n(2n+1)) = (\gamma + \log \frac{4}{\pi})/2$. We recover this previous
result of Sondow in math.NT/0508042 and provide several generalizations.
