It's just you - or rather, you're having a DNS issue, I haven't been able to resolve their address myself for a while.
Now, this is extremely bad practice, so beware:
here's an IP that works:
https://50.56.4.62/Again, bad practice. Don't trust random people on the internet not to give you addresses to phishing sites. Check it out for yourself as best you can to make sure that IP actually belongs to Bitcoinica.