I've installed the JBoss IDE/Eclipse bundle- went through the "JBoss meets Eclipse" article only to be stopped dead by this- no hint as to why, no grayed out option, nothing. This is a show stopper for me, I'm being pushed towards JBuilder by office mates now- still curious as to the answer to this one (I asume there is one).
I am a little confused. Are you right-clicking the war file in Eclipse? Or in Explorer? Others can answer the Eclipse-related question (I never use Eclipse to build or deploy anything), but to deploy a war file in Explorer, simply copy it to server/xxx/deploy (where xxx is usually "default").