The Yahoo Pen*Key group is alive and well - Just signup here ....
There are three group areas pen_key, pen_key2 and pen_key3. The first is for posting and files and the other two are for files only. There are drivers for the 6620, 6622 and 6640. For the 6622 there is
6622 Win95 Files Factory original Drivers, Utilities & Info
6622 Win98 Files Win 98 Drivers & registry files
6622 drivers & files are available in the "Files" section of the "Pen Key2" group listed in the "Links" section.