Quick! What's the second word in "beta testing." If you said "testing", you're right. That's why beta testing should be run by the testing people in QA. However, aswrites,
If you run Product Management, especially in a smaller company, you may find yourself running the beta program. This is a tactical activity, and you will be knee deep in beta user qualification, feedback, administration, possibly even support, but you can take positives from a good beta.
Product managers are often involved with beta testing because product managers want to validate the usability of the product (hint: do it much sooner), they want to show the product to some key customers, or maybe they just know more customers than the QA people. Read Paul's description of. Great stuff. Are there more?