Ever heard of SDR? This stands for Software Defined Radio and basically it means a radio that uses your computer to receive, transmit and basically function. I don't really know an awful lot about these type of radios so I'm not going to talk about using them instead of your traditional amateur radio transceiver.
I wanted to tell you about a few websites that use software defined radio to transmit over the Internet. There are a few guys over here in Europe and over in the States who have set up websites that enable you to listen to their software defined radio through the computer. Some of the stations only have one band to listen to, others have various bands using different types of antenna. You basically tune into their website, choose the band you want to listen to, type in a frequency or move a slider control and that's it, you are listening to what that particular station can hear, whether that be the East or West coast of the states, down in Romania, or in the Netherlands.
There are two that I listen to on a regular basis, The US software defined radio site W4MQ is based in Virginia on the East Coast and enables you to listen to 3 bands, top band, 40 m and 20 m. What I really like doing is monitoring 20 m to see if I can hear myself, that is a lot of fun and it gives you a good idea of what propagation is like. Another one that unfortunately shut down a couple of months ago because they had to move rooms is based in the Netherlands. This had various bands including 40, 15 and 20 m and being so close to home meant I was able to monitor myself on 20, 15 and 40 m, plus listening to all the other stuff. They will be back online at some stage, when it will be I cannot say, you'll just have to keep monitoring their website where they have been kind enough to keep everyone updated on the situation.