New Scientist has a nice article (“Searching for meanings in a meadow“) on the state of the field of biosemiotics, which I’ve mentioned here on a number of occasions (e.g., here and, in passing, here).
The new Springer anthology Essential Readings in Biosemiotics looks like a very good overview of all things biosemiotic. The 77-page introduction by Donald Favareau can be read online here or downloaded as PDF file from this page. I highly recommend it.