I've just released Simple Savant v0.4 at CodePlex. The new release includes the following features:
- Full-text searches of SimpleDB data using Lucene.NET 2.4
- Attribute spanning and compression to allow the storage of large property values in SimpleDB (attribute values are normally limited to 1024 bytes)
- Item versioning, including support for SimpleDB's new conditional puts to prevent updates with stale data
- Global and locally-scoped support for SimpleDB's new consistent reads
Rather than putting a lot of time into a blog post about the new features I've added documentation at the Simple Savant documentation wiki. You may also want to check the release notes for a complete list of bug fixes and minor enhancements.