Despite the continuing development of effective cognitive and behavioural interventions for Generalised Anxiety Disorder (GAD) less attention has been paid to the important issue of improving treatment accessibility and affordability. Self-management approaches that utilise the convenience of the Internet may provide a means by which more people can avail themselves of effective treatments. To date, studies examining the effectiveness of such approaches for GAD lag behind the work conducted with other clinical problems. This study describes the response of three individuals with a primary diagnosis of GAD to an Internet-based treatment completed at their own pace. The intervention (‘What? Me Worry!?!; Saulsman, Nathan, Lim, and Correia, 2005) combines several cognitive and behavioural components with the inclusion of a significant metacognitive component. All participants achieved clinically significant improvement on measures of worry, GAD symptomatology, and metacognitions. Moreover, none of the participants met the diagnostic criteria for GAD at the completion of the study. A larger randomised controlled trial of this intervention is indicated.