The largest manufacturer of glue, Elmer’s Glue, started a recycling program in 2008; they accept empty glue sticks and bottles (all brands). Elmer’s has made it easy by signing up WalMart as a drop off; the Greeters are trained to accept them from you!
There is also an “Elmer’s Glue Crew Brigade” program with TerraCycle (http://www.terracycle.net) for a fund raising idea to collect glue bottles and glue sticks and raise funds for your local school or charity.