Finding some interesting RSS feeds on LJ is more complicated that finding a community (at least for those who, like me, don't have a paid account). Therefore I thought that I'd share a few of those that I have found and I like:
apodEach day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
cuteoverloadIt's a must if you love tiny kittens, doggies, hamsters and other cute stuff. ;)
desert_wordsChristian meditations based on the writings of the Desert Fathers.
hist_shorpyA must if you're into old photos!
j_austen_quotesDaily quote from Jane Austen.
lent_beyondA syndicated feed for a blog of great Anglican resources (prayers, meditations, lectionary readings).
newchristianyeaChristian daily meditations and quotations.
poradniaGood resource for those speaking and/or studying Polish. :)
rijksfeedShows a different piece from the collection of the Rijksmuseum each day.
Last but not least, three interesting Christian blogs (of the Anglican and Catholic flavour):
maggi_d cassandra_pages wayofthefathers Enjoy. And if you know of any interesting feeds, feel free to share!