Idea Tweet should include relevant hashtags
When clicking the tween button, IdeaStorm currently uses the Idea Title plus a shortened URL as the body of the tweet.
At a minimum you should add #Dell #IdeaStorm to the tween body. Once you get the basics done, you might consider adding some smartness to the auto-generated hastag, such as #Ultrabook #Storage #Virtualization or whatever.
Also recomend "suggesting" the tween as opposed to just having the passive button. Perhapse in your profile you could specify if you want to auto-tweet ideas or comments...