According to Mike Abramsky, General Manager at RBC Capital Markets, RIM has sold around 250,000 PlayBooks to date. The claim comes from a note to investors that uses channel checks and states that sales have been steady since launch. According to Abramsky, RIM could move 500,000 units during the first quarter and it’s possible that new models will increase these sales. Even with the increase due to new models, it’s not clear if RBC’s earlier projections of 4 million units in 2011 and 6 million units total in the PlayBook’s first 12 months of availability will end up accurate. Nonetheless, it looks like the PlayBook is off to a decent start. So if you’re a developer wondering whether it’s worth porting your app to the PlayBook, this should help in that decision making process. Also, keep in mind that PlayBook users are starving for apps and are probably more likely to download and pay for your product.