Update: Seeds have been sent out and tracking numbers put in. All boxes were sent out via priority mail, so everyone should be getting their seeds either Saturday or Monday, depending on where you live. If you did not get a tracking number, please let me know.
If your having trouble finding the seed swap, it looks like Dave just made an update this morning and put the seed swaps under 'tools and apps', atleast according to the mobile version of the site.
Please let me know if you have any questions or concerns!