JSON, REST, RDFa, XML, RSS2, ATOM, ATOMPub, OpenSearch, OWL, SRU, csv, Dublin Core plus - what's your poison?  More specifically, what's your institution a) producing and b) consuming?

Random resources on best practice, choosing formats, etc

Common RDFa publishing mistakes

"This page contains a number of RDFa publishing mistakes that web authors make when writing RDFa web pages."