In the meantime, here is a tip that I am sure will help someone out at Thanksgiving!
|"Gravy" uploaded to Flickr.com by Sisterbeer|
That did not help.
So what I should have done, according to Good Housekeeping, was strain the gravy through a fine mesh sieve, pushing it through with a rubber spatula. If the lumps are too large for this, then transfer the gravy to a blender and puree away! Reheat the gravy if necessary.
Readers - tell me how you get your gravy to be lump free!