Frustrated by Magento? Then you’ll love
Speaking of sessions, I whipped up a quick proof of concept for accessing admin sessions from the frontend of Magento — useful if you want to restrict frontend access using backend session ACL rules.
Right now it works with file and db session storage — memcache, redis, etc. would need their own Loader model implementation. The loader models are responsible for yoinking sessions out of storage by session ID. The rest of the tedious and particular session handling logic is handled by the extension code.