Hi, they're IDN's:
save£s.com (xn--saves-ega.com)
£s.net (xn--s-9ba.net)
£stretcher.com (xn--stretcher-9ja.com)
They should work in your browser, unless you have an old one.
Technically I don't think I should have been able to register these domains and I'm not sure if you would still be able to. They are homographs and Verisign say mixing of code points is not allowed. This was the response I got from Verisign when I tried to get some with the Euro symbol in them:
"The code point mixing rule was implemented in April [2006] when we released CORE 6.3. The domains in the examples were registered prior to that, where they would have been allowed. Domains after we released CORE 6.3, should not have been allowed."