Although I cannot emerge hypertail, I have checked out gdesklets website. It seems that hypertail depends on another gdesklet x11-plugins/desklet-regexp http://gdesklets.gnomedesktop.org/categories.php?func=gd_show_app&gd_app_id=215 QUOTE: This desklet also makes use of the RegExp Control which can be found here: RegExp Control Reproducible: Always Steps to Reproduce: 1. 2. 3.
Thanks for the heads-up, I thought I'd put it in there when I wrote it (after all, that's a big reason why desklet-regexp is in the tree!).