ibrowse may be able to show aw.net, amiga-news.de and aminet, but thats probably about it. sorry to say.
a1k.org aswell, at least until the next software upgrade. And os4depot should work too (without colors), IIRC.
For amiga.org, Karlos wrote a Proxy that 'translates' amiga.org's output into something IBrowse can use:
http://aoproxy.extropia.co.uk/
