4.3 Water Pump Leak?

[Super D]

Hello,
Noticed a very slight trickle from my water pump weep hole, but only for a few moments when it was cold, then it stops. How long before it goes out on me and how serious is it in the meantime? Its on a 2000 merc 4.3, no that many hours, really, but oh well.
Thanks for any help!
Super D

[Super D]

ok - removed and replaced the water pump just to be cautious. New pump - $75 shipped to my door from NY. 8 seasons on the old one, hopefully 8+ on the new one. Online purchase from http://marineengineparts.com/ by far the cheapest out there.
New belt installed while I was in there - $35. Peace of mind!