John Minkjan posted some interested and useful articles as usual. First is How to edit OBIEE system-wide defaults, the second one is about making a distinct date prompt in OBIEE, and finally OBIEE reporting on data ranges.
Adrian Ward has several wonderful OBIEE tips submitted by his readers.
Mark Rittman hosts a free seminar in London in a few weeks. So if you happen to be around, I strongly recommend you attend.
Venkatarishan J has posted an extensive article on Hyperion. Data Archive and Replay in BSO Cubes.