Many hobbyists design SDRs these days. The most promising I've seen so far is the AFEDRI SDR-Net, designed by 4Z5LV Alexander Trushkin. The latest version is not only able to cover the MW spectrum (1250 kHz bandwidth), but even has an ethernet connection! In other words, you can connect it to your router/switch, and access it with whatever PC is connected to your LAN. Just like the RF Space NetSDR.
Photo: 4Z5LV Alex
The specs aren't out of this world, but neither is the price tag. It will be interesting to see how well it fares compared to my other SDRs, Perseus, NetSDR, Excalibur and Excalibur Pro.
I've just ordered one, and I hope to do some preliminary tests by the end of May. Thanks Tracey Gardner for alerting me.