How to Weave YR into the Very Fabric of Life.

So I was thinking... with disk drives having a finite lifespan, and DVDs only lasting about 100 years, how can we preserve this blog for, say, 200 million years? That's when I found this article about genetic tom-foolery from Pacific Northwest National Lab.

"We [are] taking advantage of a time-tested, natural, nanoscale data storage technology perfected over the last 3 billion years."

Encode our blog into the DNA of a robust species! Take that Zip drive!
Now imagine for a sec... the DNA of more species is being decoded every day, what if some gene googler discovers a message in the "junk" DNA of a weed or a bug? Ferns and horsetails are ancient, pre-dating dinosaurs. Perhaps they would contain a message from a fallen civilization millions of years in the pre-homo-sapien past? It would be insanely hard to decrypt, but would that not be the coolest? Someone write a sci-fi novel on this so I can read it. Thanks.