Sports Card Radio has a list of a few promoters who are running some baseball card shows in 2010.
JP Sports Promotions
New York (NY)
The Event Pro
California (CA), New Mexico (NM), & Nevada (NV)
RK Sports Promotions
New Jersey (NJ)
PSA On-Site Grading
CA, NY, IL, PA, GA, OH, MD, FL,
More dates and promoters to come!