This IDC update reviews significant announcements in April surrounding what we're calling the ultra-low-cost PC space. We recently released our ultra-low-cost notebook forecast, taking into consideration all of the events surrounding this emerging category over the last few months. On the topic of emerging categories, we're also ramping up our coverage of the green technology market. However, we're not forgetting about the basics as we also released our top 10 PC market shipment estimates for the first quarter. Here are the highlights for the month: