When I tried to get into their website just now, I got an anti-virus warning, so the website may be down for technical reasons.
But it is possible, "in the current economic climate", they've gone out of business. Although you'd hope they'd be able to fulfil any outstanding orders, since I'd guess it's pretty much a one-man-band operation.
Did you pay by credit card? You might be able to make a claim through your bank.