On Sat, 26 Apr 2008 11:15:39 -0700 (PDT), Shaun Eli
wrote:

fortunately it's at the high end, the opposite side of the house from
the drain... Anybody have a suggestion about how to get them to move,
without hurting them? Alternatively, at what point in the summer I
could dump the nest because the babies have already flown?

Watch the nest twice a week for a minute. You'll know when they are
done. I'd expect it should take less than 2 months, depending on the
bird/conditions. Have patience, clean out your gutters, and consider
installing gutter guards.