How long has LingQ been up and running?

Just out of curiosity, when was LingQ publicly launched?

About 2007/2008.

See’s Wayback Machine on April 3rd, 2008:

According to Steve’s profile, he’s been a member since January 2007.

Steve’s language site and blog, and precursor to LingQ, is copyrighted since 2002.

LingQ was launched in August 2007. Any accounts from before then are beta accounts. The precursor to LingQ, TheLinguist was launched in 2002 but only taught English.