This is an awesome opportunity to exercise your Neo4j modelling skills, especially now that Neo4j 2.0 (with labels) is out. Please note that the deadline for this challenge is Jan[masked] (it was extended a bit upon request, will make sure that it gets reflected on the page as well)
If you have some time you can watch this webinar http://vimeo.com/81146271
which explains exactly what graph gists are and how you can participate in this challenge.
I would like us in Stockholm to have a meet up where we can create our own graph gists. The event would of course be before the January 31st deadline (mid January sounds good to me). It would be a "no talk, just hack event". People new to Neo4j would be helped, but they are expected to know about the basics since there would be _NO_ intro level topics covered :)
Would you like to help us host as event at your company premises in Stockholm? Please let me and or Jacob know in private.