There will also be a talk on "Experiences Using ReactiveMongo to Build a Json API with Play", and Ross Lawley (maintainer of "Casbah", the Scala driver for MongoDB) will also be presenting.
And is if that wasn't enough, to make the trip from Leeds slightly more affordable, Leeds Scala User Group members can save 10% on General Admission by using the promo code LDN10.
Hope to see some of you there! Let me know if you have any questions.