GPU and pgcrypto

Gc,

For passwords the use of
http://www.postgresql.org/docs/8.4/interactive/pgcrypto.html
is advised.

But what about GPU cracking?
Is crypt-bf/8 strong enough?

cf bcrypt in php:
http://stackoverflow.com/questions/6791126/how-is-bcrypt-more-future-proof-than-increasing-the-number-of-sha-iterations

mvg,
Wim