I am not in too many (or maybe zero) Yahoo Groups (and if so I never have them sent to clutter my email) but this Yahoo Groups RSS URI Generator is ideal for keeping updated on public groups without trudging through the Yahoo site.
Again- RSS lets me customize the stuff I want rather than some service thinks I want. It is kind of funny that these services are low profile on sites implementing RSS (like Yahoo, Wired, Amazon…) as opposed to us puny bloggers that usually scream out HERE IS MY RSS! THREE KINDS! GET IT! USE IT! A’INT IT COOL?