I just published my codeplex project for a taxonomy filter web part. The web part works on XsltListView’s and provide a hierarchical term picker to filter against taxonomy columns.
It’s currently a farm solution for SharePoint 2010, but a version for 2013 (with 365 support) is in the plans. The project can be found at: https://sptax.codeplex.com/
Hope it’s useful!
