It seems, despite some derision, there is quite a bit of enthusiasm in the Windows Phone community for Blackberry Messenger on Windows Phone.
The company is currently running an open beta, and started taking registrations last night. In less than 24 hours the beta has been fully subscribed, with users now being asked to register for a waiting list.
BBM currently has more than 100 million active users, which is certainly a lot more than the actual number of people who still use Blackberry, which I guess means we should really welcome another real competitor to the messaging app race.
Join the waiting list at Blackberry.com here.