we used it at my startup for several months to replace email, discussion forums, and wiki-based sharing. i loved it; others found the UI so hard to use (and bu

we used it at my startup for several months to replace email, discussion forums, and wiki-based sharing. i loved it; others found the UI so hard to use (and buggy) that we wound up abandoning it we never used the document uploads -- they didn't work reliably for everybody at first, so we used dropbox instead. also most people hated the see-as-you-type feature.