The talk discusses the challenges of developing BSD drivers and the differences between the BSDs. The speaker compares device driver code between the different BSDs and discusses the need for more convergence and a unified driver API. The speaker presents ideas for collaboration and sharing of code, including the creation of a new exchange space called BSD Driver Harmony. The talk also touches on the importance of keeping specific constraints in mind when creating an abstraction layer. The speaker introduces a mailing list for discussion and invites collaboration from developers across the different BSD projects.