If you’re in the EU and seeking a 2013 Moot to attend, Munich is hosting their 2013 Moot from February 28th through March 1st (the 26th and 27th offer preconference workshops on site as well): http://moodlemoot.moodle.de.
Registration is €110 for both conference days. Preconference fees vary but there is a great lineup of presenters including Petr Skoda and David Mudrak, and Julian Ridden who are presenting in tandem on core development and Moodle theming respectively. Martin Dougiamas and others will be the keynote speakers.
For more information please visit http://moodlemoot.moodle.de.