We aren't planning to run large scale events at this time for a couple of reasons.
In 2009 we are looking at the entire Research & Development function in addition to using this period to consider fresh ideas. Also events like Mashed are extremely costly so this decision has been taken in part as one of the BBC's Future Media & Technology division's contributions to the efficiencies effort that is being undertaken across the entire corporation.
We are also looking to better support smaller grass-root events such as BarCamps and Geek Events across the country. We actually have a calendar which you can follow in iCal format here or RSS here. There's a calendar here too.