I would want to know who is hosting it first, where they're hosting it second, and what their capacity is third. I could probably find out the last two points based on the IP address... just not able to do that at this instant. Also, the fact that the server isn't running on port 80 means that people may not be able to listen behind workplace firewalls, unlike WU's server (and how I have mine set up). I'm not likely to switch to an unknown server at this point. The fact that a dyndns hostname is being used makes me wonder if this is someone running a server out of their home.
Phillip, to your question... I'm using a Linux VPS through DigitalOcean... their cheapest option is $5/mo, no contracts required. You get a VPS with a single CPU core, 512 MB RAM, 20 GB of storage (plenty for a streaming only server), and 1 TB of data transfer per month. IPv6 connectivity is available in most of their data centers too. With 1 TB of data transfer, you could have uplink of a 16 Kbps stream as well as 200 simultaneous 24/7 listeners, and you'd be just about at the limit. I picked Ubuntu as the OS, installed and configured Icecast, and set up UFW to block any connection attempts except 22 (for admin of the server) and 80 (for Icecast). SSH is set up with key-based login, so it's pretty secure.
If I really wanted, I could even block 22, since they have serial console access through their control panel... though that's username/password-based.
If I wanted, I could probably host a few other streams for the heck of it, since I know I'm not getting 200 people listening 24/7. I'm just not sure of the "surge" capacity on this VPS (what it's actually capable of handling at max), which is why I haven't offered to host anyone else's stream yet.
Edit to add: The IP address behind that hostname belongs to Cox Communications... I don't expect that will be able to handle a massive surge of traffic during severe weather, unless it's on their Gigablast service. Plus, with a single global stream password and no limits on mount point creation, this person is opening themselves up to some serious abuse of their server.