The IPv6 blog http://goo.gl/OE5hyq shows a list of Xsnews resellers that provide access via IPv6:
2001:67c:174:101:0:65:ff02:1 Usenet2go
2001:67c:174:101:0:65:ff02:121 Astinews
2001:67c:174:101:0:65:ff02:122 Newsxs
2001:67c:174:101:0:65:ff02:126 Bullcat
2001:67c:174:101:0:65:ff02:129 Unet
2001:67c:174:101:0:65:ff02:131 XS News
2001:67c:174:101:0:65:ff02:132 I-Telligent
2001:67c:174:101:0:65:ff02:133 Aviteo Ltd DE
2001:67c:174:101:0:65:ff02:135 Its Hosted
So, if you have an account with one of these news provider (and you have IPv6 yourself), you can access them via IPv6: just fill out the IPv6 address as newsserver in SABnzbd.
HTH
FYI: Xsnews resellers with IPv6 access
Re: FYI: Xsnews resellers with IPv6 access
Interesting, thanks.