Meanderings of a Mermaid

Hello My Fellow Gardeners; I've been in this house two summers now and I stil don't know what this plant is. (I can't seem to move photos around very easily in this format, so I am referring to the fourth photo. It grows easily in the corner of my garden, climbing the wooden fence and threatening my neighbours' extensive backyards. It has a woody vine. Little berry or grape-like clusters (could it be a wierd variant of a grape?). I don't even recall seeing the little berry-like things last year. And there are tiny pale yellow flowers. So anyone out there with the knowledge? And just because its so lovely, a couple more garden shots for my friends.