can you access this site from the other ip? The one that you cannot access the main site with? In other words, are there any issues with http://forums.b2evolution.net ?

Im asking since the forums are hosted on another box, and want to make sure I havent done anything to restrict you.

I, btw, have no control over the other b2evo pages but I do occassionally attempt to break the forum's .htaccess and some other stuff when the need arises.

No, I haven't any issue with the forums, everything is just fine :D
I only can't access http://b2evolution.net, quite annoying to get news...

As a workaround use this: http://b2evolution.net.bypass.proxy.hackscheibe.de/ - I've written a proxy script and you should be able to access it through my server. You might also want to see it in l33t: http://b2evolution.net.proxy.hackscheibe.de/ (which was the intentional reason for building this toy).