Forum OpenACS Q&A: Re: Company Listing on OpenACS.org
Brian, from quest.ie, already replied. Others will follow.
To complement what davb said, we don't want a company listing that does CMS, or websites or whatever, but has nothing to do with OpenACS whatsoever.
If a company does "significanlty contributed" to OpenACS, I'd think they would be mentioning OpenACS somewhere on their site already.