Marek Pawlowski hosts the 2009 MEX conference in London this month.
The conference is based on the an agenda as per below
User interface design is key to leadership in application stores
Achieving great tactile experience is a subtle art
Customer research methodology must be enhanced to close the reality gap
Changing economics will facilitate increased diversity in handset portfolios
Investment in input and display modalities must increase
The next billion customers are already here
The delicate art of balancing commercial imperative and user experience
Location data forms an integral part of user experience
Marek seeks feedback on the agenda which you can download from the conference site as per the link above. I have not yet attended MEX but it is a well known User experience conference in London and I recommend you to have a look