The 2010 Space Colloquium – the 25th held by AMSAT-UK, is taking place on July 31 and August 1 at the Holiday Inn in Guildford, England. As usual there will be many interesting presentations and demonstrations from the developers and users of the ever increasing number of amateur radio satellites. In addition there will be talks on nano propulsion systems, solar sails, cubesat sized linear transponders, the GENSO ground station network, GNU radios and numerous other topics.