There's been loads of work going on in various branches on Synapse (federation_authorization and event_signing) as we land the final features needed for Synapse to be used in production as a Matrix reference server. Meanwhile the iOS demo client and SDK has been coming on leaps and bounds too over at https://github.com/matrix-org/matrix-ios-sdk.
However, stuff has also been happening on the main Synapse development branch too, and we've just released 0.4.2 onto master for lots of various goodies - see release notes below.
Please upgrade your homeservers and play with the new client - the new JSON viewing/editing features are particularly useful and interesting for powerusers and developers!
Changes in synapse 0.4.2 (2014-10-31) ===================================== Homeserver: * Fix bugs where we did not notify users of correct presence updates. * Fix bug where we did not handle sub second event stream timeouts. Webclient: * Add ability to click on messages to see JSON. * Add ability to redact messages. * Add ability to view and edit all room state JSON. * Handle incoming redactions. * Improve feedback on errors. * Fix bugs in mobile CSS. * Fix bugs with desktop notifications.