I cannot access the gotwoot.net site either, nor do my torrents work (even if I download them using another ISP).
My IP address is 83.146.x.x - please have a word with your Web host to ensure this range (and others, it seems!) are not blocked. I have been in contact with my ISP, and I know it is not them. They actually said it would be down to the address range I lie in - apparently, a lot of Web hosts blocked this range a while ago. Several sites (including hydrogenaudio, thetrainline and others) have already been contacted and they are now accessible.
The staff here have stated adamantly that they have not blocked any IP address ranges - but I would say that the number of people posting problems here contradicts this. Either you are unknowingly blocking huge swathes of people - or your own Webhost is, unbeknownst to you. Please get on their case and get this filter lifted.
What IS strange is that I *can* access forums.gotwoot.net from my computer and ISP, even though the main site itself is blocked. Are there any differences (host, network configuration) that would cause this?