Hendrik,
This isn't exactly what you have in mind (it's commandline,
rather than curses/$EDITOR), but it should be easy to drive
from a curses-y frontend ..
$ emerge search remind
Searching...
[ Results for search key : remind ]
* x11-misc/remind
Latest version available: 03.00.22
Latest version installed: 03.00.22
Size of downloaded files: 312 kB
Homepage: http://www.roaringpenguin.com/products/remind/
Description: Ridiculously functional reminder program
License: GPL-2
--
Jean Jordaan
http://www.upfrontsystems.co.za