Here's a couple of pictures of two slab tables I made recently. They still need to be finished but I think they turned out pretty well. They were very easy to make. I took some old slab pine I had laying around for the top and I used dried and stripped birch sticks for the legs. I used a special tool for my drill that looks like a pencil sharpener to cut the 3/4" tenons on the legs that fit into the angled holes in the table top. I split the ends of the tenons so I could hammer in wooden wedges from the top to make the legs fit tightly. Keep in mind that you have to use really dry wood for the legs because green or damp wood will shrink when it dries and the whole table will become loose and wobbly.

I'll post pictures of the finished tables soon along with detail pics when I build another one.