Developers are looking to cash in for the upcoming BlackBerry 10 release; just days after opening app submissions, the company received over 15,000 apps.

Less than 48 hours after the company's announcement, RIM's VP of Developer Relations went to Twitter to announce the volume of apps they were receiving:

Well there you have it. 37.5 hours in, we hit 15,000 apps for this portathon. Feel like I've run a marathon. Thanks to all the devs!

RIM is offering some incentives to push developers to submit apps, two to five submissions gets developers a free Blackberry Playbook. More than five apps puts you up for a chance to receive a BlackBerry 10 Alpha smartphone.