We released for free two WOWODC 2011 presentations. The first one is Designing WO applications for remote Sync, from David Aspinall. The other is is ERRest (what's new in ERRest, security, versioning and debugging) from Pascal Robert.
Both recordings are now available in the WOCommunity podcast feed and at http://www.wocommunity.org/webobjects_screencasts.html
ERRest and ERSync will both be talked about again at WOWODC 2012, if you wish to learn more, check out the WOWODC Web site.