Research into ADHD continues at an encouraging pace and pleasingly there is a vast body of knowledge developing. In this edition of Abstract Watch, we highlight a study by Liebrenz et al,which explores the association between ADHD subtypes and substance use. An interesting study by Martin et al reveals more about the nature of friendships among children with ADHD. In the quest for neuroimaging markers, Hammer et al explore functional MRI in visuospatial working memory tasks, with good results. Our last abstract is a ray of hope for the needle-phobic; Stegmann et al highlight a method for quanitifying ADHD medications in oral fluid.