Here are a few links with MJO material that may be what you're looking for. I don't know exactly what kind of material you're after, but hopefully one of these will contain some things about MJO that interest you.

http://www.esrl.noaa.gov/psd/mjo/

http://www.americanwx.com/bb/index.php/topic/30506-mjo-questions/

http://www.nws.noaa.gov/ost/climate/STIP/36CDPW/36cdpw-njohnson.pdf