Open Street Map user already or to-be? Interested in GIS?
"The very first State of the Map was held in Manchester in 2007. Since then it has been to Ireland, the Netherlands, Spain, Colorado and Japan." And this year, it's back in UK - the convention will be in Birmingham, UK on 6-8 Sept (Hurry, early bird prices ends before June!). If you are already an OSM user and have something to share, the call for presentation for this convention is ongoing until 10 June. check out: http://2013.stateofthemap.org/
Across the pond, there's a state of the map event in San Franscisco very soon - on 6-9 June at the Mission Bay Conference Center: http://stateofthemap.us/