We have now gone almost 24 hours with just a few issues arising but everything looks nominal except for the EU1 server.
Since the EU server is so far away from Steam Authentication Server the way our authentication works its not able to keep up with requests coming in. Eventually these start to pile up which cause Login Timeouts (Players not able to login).
We are working on finding a more effecient way to process logins in Europe and will let you know when we have a fix deployed.
-FTO Staff