Idaho's 2010 resident elk tag quotas go on sale July 10, 2010. They are first come first serve. Here is a link that will show you how many tags are for each unit and how many remain after they go on sale July 10, 2010.
http://fishandgame.idaho.gov/cms/licenses/quota/resquota.cfm
If your from out of state here is the link for non resident elk and deer
http://fishandgame.idaho.gov/cms/licenses/quota/nrquota.cfm