Hi - Just an FYI for anyone looking for free, large cardboard boxes (to layer on the bottom of the garden) and/or wooden pallattes (to create a compost bin): I've talked to 2 of the centrally-located bike shops and both would gladly let people take their unused bike boxes and wooden pallattes. You can call in advance to see if they have some available.
Bicycle Sport Shop - 517 S. Lamar / 477-3472 (ask for the warehouse)
Jack & Adams Bicycles - 1210 Barton Springs Rd. / 472-5646