According to Feedback in RadioBee's forums, Pearl users are saying it does work. radiobee.com :: View topic - Blackberry 8100 Pearl
Quality may be an issue considering the Pearl can only handle data via the Edge network which is slow for streaming media. And because it is data, you're pretty much required to have an unlimited data plan.
If you plan on using RadioBee, you'll have to find compatible radio stations streaming in mp3 format.
Hope that helps.