The following sites are a partial list of people using Tastypie. I’m always interested in adding more sites, so please find me (daniellindsley) via IRC or start a mailing list thread.
Read-only API access to recipes.
A hosted documentation site, primarily for Python docs. General purpose read-write access.
An e-book search site that lets you fetch pricing information.
To power their mobile (iPhone/Android/Playbook) applications.
LocalWiki is a tool for collaborating in local, geographic communities. It’s using Tastypie to provide an geospatially-aware REST API.
I-Am-CC.org is a tool for releasing Instagram photos under a Creative Commons license.