I've used the old VWS (Virtual Weather Station) to feed my data to WU for years. I noticed that the feed wasn't working this afternoon when I couldn't get an update via Weather Mate.
I killed VWS and restarted it, then went to the Wunderground tab's Signup and Settings and clicked 'Upload Now'. I upload 'Rapid Fire' every 3 seconds, and currently WU has accepted over 32,000 records! That's the nice thing about VWS's WU uploads-they just keep going until they're caught up and the blanks are filled in
Who knows how long this upload is going to take or if my data will again appear once it's done...