Discuss some cool graph topics

As Peter Neubauer and Michael Hunger are in town, we thought it would be nice to have a meetup the day before FOSDEM - GraphDevRoom

We have a number of topics that we could talk about and wanted to know which of those would be interesting for you:

Spring Data Neo4j - Object Graph Mapping made easy Neo4j Spatial - handling geographic information in a graph, Geo-APIs, OpenStreetMap Structr CMS - a novel CMS built on top of Neo4j Neo4j in the wild - interesting real-life applications of Neo4j
Please state your interest so that we can prepare accordingly.