Jeff Atwood has pointed to the conference sponsorships that Stack Exchange offers. I was thinking that we could also be a general resource available to conference-goers right here by answering any questions that attendees may have. If we're lucky, we'll get some good queries in the R and Software tags.
As for promotion, I'm hoping that anyone else going to the event can point to this site as a resource for the curious. R users make-up a large part of the Quant SE user base, so we should be available to help-out as needed.