Fax Server Solutions for 2005?

Glove d'OJ asks: "For a recent project at work, we are investigating enterprise-wide fax server solutions. Ideally, it would have a rich API for custom development, as well as all of the standard 'fax as a printer' and 'email out a fax' capabilities. Throughout all of my research, however, most of the decent reviewing sites all appear to have last reviewed this technology sometime last century, i.e., 1999 (or in 2000 for the purists.) I cannot find a single somewhat-recent review. Timeliness is definitely important in looking for the API. if the latest documentation refers to 'that new fangled C++' and was written in the pre-C# era, I could have some rough choices ahead. Is this an old technology that is no longer in vogue, or is there a single clear choice with no competition (thus not even requiring a recent review)?"