Yea, they've beeen mostly down all day.
However if you replace (first backup) the contents of your woncomm file (HL/Valve/Woncomm)with this, it seems to work:
/// Server Lists
//
Titan
{
65.73.232.251:6003
65.73.232.253:6003
65.73.232.252:6003
}
Auth
{
65.73.232.251:7002
65.73.232.253:7002
65.73.232.252:7002
}
Master
{
65.73.232.251:27010
65.73.232.253:27010
65.73.232.252:27010
}
ModServer
{
65.73.232.251:27011
65.73.232.253:27011
65.73.232.252:27011
}
Secure
{
half-life.speakeasy-nyc.hlauth.net:27012
half-life.speakeasy-sea.hlauth.net:27012
half-life.speakeasy-chi.hlauth.net:27012
}
Let me know how you make out.