I have checked the server, via both http and ftp, and the the server and files are both there. I have also checked the embeded links for errors and they all seem to be ok. I see the images ok on my computer, both in this site and at the host URL, using Vista and IE8. I have never known the server to be down in the 10 years that I have managed that website, but there is always a first time I suppose.
There is one other thing that may be causing an issue, some ISP's may have blocked the domain name in thier perental controls software as the main site is for a registered firearms dealer here in the UK. I know that it is sometimes a problem with some UK ISP's especially for those on mobile broadband, including on some occasions my own MBB provider. When ever I have run into this problem though it always says why the page is blocked.
I prefer to host my images on this server as I can pretty much do what I want with it, rather than having to muck around with Flicker or the like.
Alan