Just saw on VoodooExtreme that they just got word from Ross Perez at WON.net about the auth problem and well they got the steps to fix the problem with WON not authorizing people. Here's what do to.
Using Notepad, open the woncomm.lst file under /valve/ in your Half-Life folder.So everyone try that out and post your comments as to it working or not. Hopefully that'll fix that bug.
Under "Auth", switch the two authentication servers (bottom one to the top and vice versa).
Save the file and start up Half-Life, going about as usual.