That's too vague. The least you could do is tell what happens, including the number or text of the error message, if there is one. The site uses flash, but I don't interpret your description as a specific problem with that part of the page. But I might be wrong.
The other computers, that do show the site, are they using the same physical connection (dial-up, cable, adsl; router?) and the same ISP?
- Look if you have a file called 'hosts' (no extension) in the Windows folder, and if so, rename it and see the effect.
- On all three machines, go into ms-dos/command prompt, and type ping www.senseofbeing.net (followed by enter). Note the different reactions.
- Go to www.mozilla.org and download their browser. Does that show the site?
Hope this helps.