The event is free to attend, and represents a great opportunity to learn and interact with the SharePoint community.
There is also a great social side to SharePoint Saturday, and there will of course be a SharePint after the event.
ISC Software is one of a number of Sponsors of the event. Without all the sponsors events like this could not happen, and they also have an important role to play in your SharePoint implementation.
To find out more about SharePoint Saturday London and to register go to www.spslondon.org