Neo4j 1.8 Milestone 4 is now available, offering new ways to find happy paths in graphs by updating the core Traversal Framework and introducing new Cypher features. The framework allows traversals to be controlled differently, such as which relationships to traverse at any given position, ordering, and so on. This release introduces bidirectional traversals, enabling faster traversal with less relationships traversed, especially when both start and end nodes are known. Additionally, the "expander" can now view the whole path leading up to the current position, and minor improvements have been made, including metadata about traversals and convenience methods on the Path interface. Users can take advantage of these new capabilities by writing optimized Cypher queries that utilize bidirectional traversals.