ACA has a handy new “Chronology of U.S.-North Korean Nuclear and Missile Diplomacy”:http://armscontrol.org/factsheets/dprkchron now online. Can’t say that I’ve read it end to end, but it looks like a useful resource.
If you just can’t get enough NK chronology, NTI has more on “missiles”:http://www.nti.org/e_research/profiles/NK/Missile/chronology_2008.html and “nukes”:http://www.nti.org/e_research/profiles/NK/Nuclear/nk_nuclear_2008.html.