The quest for enterprise mashup tools

The recent round of discussion of enterprise mashups has been a good one, led primarily by a stellar write-up recently by Galen Gruman, and highlights a phenomenon that is nigh upon us. As part of tracking this, I’ve been spending the better part of the last couple of months searching high and low for good quality tools that let anyone build enterprise-quality mashups, and I can safely report here that there are only a few.