LoTW Users List
This is my version of HB9BZA's LoTW Users List with the following difference: It adds the date the callsign was last uploaded to LoTW.
Last additions to the list: January 29, 2010.
All callsigns were last tested & updated: January 29-31, 2010.
There are 31,889 callsigns in the current list.
If you are waiting for a confirmation and that user has not uploaded since, say 2003, it is an indication that you might want to contact the station to see if they plan to update their LoTW records.
The file also begs for some analysis such as this:
You can download the data here. Right-click over the link and select Save-As or Save Target As from your browser.