Just a brief meta-note: I've added per-tag feeds to tekuti, based on a patch kindly provided by Brian Gough, and unkindly neglected by me these last four months.
Anyway, you can now access http://wingolog.org/feed/atom?with=guile&without=web&with=scheme and other such URLs. Should be good for planets.
Let me know if there are any problems. Thanks!