Well, as they say, "if you have to use dropdowns you should probably rethink your site structure".
The ALA article Andreas mentioned is actually not that good, since it is still totally inaccessible to IE users with Javascript turned off. There are no good alternatives on the web (yet), so I don't know where to point you. ****************************************************** The discussion list for http://webstandardsgroup.org/ See http://webstandardsgroup.org/mail/guidelines.cfm for some hints on posting to the list & getting help ******************************************************