Nirvana says:
MYSTERY SEEDS
Once upon a time, while traipsing through the Nirvana Storage Vault,
one of the little Nirvana elves came across a mystery.... a great big
stash of shiny new seeds! The little elf couldn't find any label or
information on the seeds, and no one could tell him where the seeds had
come from.* After testing them for viability and finding that the seeds
were healthy and viable, the little elf decided the seeds were a gift
from Santa's own Seed Stash!! He decided that Nirvana customers should all benefit from this unexpected find, and asked the Nirvana Powers-that-be whether it would be OK to give the seeds away. The Powers smiled benignly and said: "Of course, little elf. Knock yourself out." And so it came to pass that anyone who ordered from the Nirvana Shop in December 2009 received a pack of free mystery seeds. The little elf couldn't have been happier. Awww.
* We don't know. Honestly. So please don't pester poor Alice asking what strains they are - consider them a happy little bonus. If you're a grow room control freak, just pass them on to a mate in the spirit of giving. ;-) This offer has been extended until we run out.