How I got hooked up with the SETI League: I showed up at a Philadelphia SF convention in Nov 1998 with the little "Dog and Pony II" demo reactor. It was a big hit. Shuch was in the audience and took some pics which went on their website as "Picture of the Week", March 6 and 13, 1999. By that time, Shuch and company had rigged up their own dog and pony show demo radiotelescope to take to SF conventions, their March 20 pic of the week.
They don't yet have an article on this new signal. I was interested if any of their homebrew receivers are sensitive enough to pick it up. Here's the sort of equipment they run. The older receivers they use are sometimes found on e-bay for a few hundred dollars. That and an old "West Virginia Sunflower" satellite dish and supporting front-end electronics make a credible radiotelescope. One needs a larger ground station dish to have a chance at SETI signals.
1.3 –1.7 GHz Waterhole frequency coverage (but the receivers can be tuned to other bands than the water hole)
Sensitivity of 10^-23 Watts/m^2; 10 Hz DSP bins
The new signal is 750 mJy, or milliJanskys, a new unit for me. But if I'm reading the wiki right, a Jy is 10^-26 W/m^2/Hz, with Hz interpreted as bandwidth spread. The new signal is 0.75 Jy. This would put the amateur Argos receivers, running 10Hz bins, about a 3-4 orders of magnitude too insensitive to pick up this signal, whereas they would have gotten the WOW signal.
The strength of the amateur SETI approach is not sensitivity ... hard to compete with the Allen array. What the amateurs offer is number. The Allen array can only look at one tiny area of sky at a time, and with some bandwidth limitation (I think they run multiple receivers at once but you can't see the whole spectrum instantly). Plus the Allen array can only be used for SETI a tiny fraction of the time. The result it that its chance of detecting a signal is nearly zero.
The amateurs, by contrast, are only limited by the willingness of people to invest a few thousand bucks in a huge dish and some electronics, which they point to some band in the sky and let run and run and run, as they filter thru the false alarms without reward for year after year. The SETI League goal is 5000 such receivers. Lacking the sensitivity, they'd probably not detect anything but the evil aliens coming past the Moon. 50 kW television signals from 93 LY? Totally lost in the noise. It would have to be a very powerful and deliberate signal such as I had in my story, and the implications of that are ... chilling.
So, really, both approaches have almost the same chance of success, which may be around the same as me winning a billion dollar lottery.
But I do play big lotteries, and I have checked e-bay for a deal on an ICOM microwave receiver.