You can view the cover and 33 selected pages from the Lindisfarne Gospels at the British Library's Online Gallery. Scroll down the alphabetical listing of the Library's most cherished items. After passing Alice's Adventures Under Ground and Handel's Messiah, you will eventually get to the Lindisfarne Gospels. You will have to download a Microsoft Silverlight plug-in to make the British Library’s “Turning the Pages” feature work, but it’s worth it.
Additional information on the Lindisfarne Gospels can be found at this page of the British Library website. (Click on “tour” and then click on the five sections.)