Silk Road login will NEVER ask for your PIN. If you are at a login page asking for your PIN, then you're at a phishing site. If you have ever provided your PIN at login, make sure you change it IMMEDIATELY along with your password. The url you mention is the correct url, and at that correct url, you will never be asked for your PIN. I hope this makes one thing very clear: NEVER PROVIDE YOUR PIN AT LOGIN - SR WILL NEVER ASK FOR IT.