I created an alias to launch sublime X from bash on OSX, and it seems to try to open the file, but always complains that is can't open the file format.
BTW, I was looking for where session information is stored along with packages, but can't seem to find anything. I would assume they would go into ~/.sublimetextx or something similar? That is what most other editors/apps do configuration data on unixy systems.
Overall though, things are looking good. Glad to see the start of the QuickPanel!