Every ISP I've used had a usenet server, most still do. For something ISP independent, I've generally found
aioe a suitable access point, but my only interests on usenet generally fall under reading comp.lang.* periodically.
One thing you might also check out is the
lupg, depending on your level of experience it may be of help.
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Thou shalt check the array bounds of all strings (indeed, all arrays), for surely where thou typest ``foo'' someone someday shall type ``supercalifragilisticexpialidocious''.