The title pretty much sums it up, but as of Revision 80, the SubSonic.dll assembly has been assigned a Strong Name Key (SNK). As part of the process, the MySql.Data assembly was recompiled with an SNK as well.
While there's still some work to be done to reach full CLS compliance, the assembly should be a bit more GAC-friendly now.
As I can't test the full range of possible deployment scenarios myself, please let me know your experiences, positive or negative, with the signed assemblies. Thanks!