Today's feature is a multipurpose reference site with oodles of information and tools just waiting for you. It will bear some sifting through, but lots of goodies are available at:
Martindale's "The Reference Desk"
Next week we'll have another multipurpose reference site, and that will be the penultimate regular "bonus" blog. The blog will be continuing, perhaps in a slightly different form, but bonus sites will be added only as I find them, rather than on a weekly basis.