Edge of factoring technology? Schneier in 1996's Applied Cryptography says: 

"Currently, a 129-decimal-digit
  modulus is at the edge of factoring
  technology"

In the intervening 15 years has anything much changed?

The same algorithm is used for factoring, the Number-Field Sieve. It's probably been optimized further. But the main difference between now and then is computing power. Since the asymptotic running-time of the NFS is "known", you can even extrapolate into the future (assuming your favorite version of Moore's law).
