Locale is exclusively available through the Android Market, and can be found here: https://market.android.com/details?id=com.twofortyfouram.locale

We did sell Locale via our own website between mid-2010 and early-2011, in order to support users without access to the Android Market. Since then, the Android Market has become available in many more countries so it is no longer necessary for us to sell Locale directly through our website.