I heard several dashers on March 3, 2012 late at night. I got to use a 3 element 80 meter beam and a foursquare for 80m. This was not at my home site where I only have an 80m dipole.
I heard one dasher around 4096.25, another around 4096.55 and another a couple hundred kHz higher than that. All were right around the noise level but coming up out of the noise about 70% of the time.
I haven't been able to hear any of them at all this winter at home on my 80m dipole but it's obvious they are active and detectable in this area with a superior antenna system.