Mitedo,
I cannot give you any photos of setup since my camera is the only one I have got, but:
1. D70 + Nikon PB-6 Bellows + Nikon 50/1.8
2. Table lamp
3. Slice of bread
All that sitting on a table.
Bellows:
1. Better magnification and support. But not possible to extend magnification just just, since camera is mount rather far away from body
2. Heavier, more stable, but also less convenient for carrying
3. More expensive
Tubes:
1. Less magnification
2. More sensible for bending in larger setup = larger magnification
3. Lighter, easier to carry
4. Cheaper
I guess your choice depends on what you want to photograph.
Here are other examples with bellows, if you havent seen that:
http://web.aanet.com.au/krpolak/tests/krpolak_supermacro.jpg
http://web.aanet.com.au/krpolak/tests/krpolak_supermacro_02.jpg
Regards,
K.Polak
PS: Forgotten to add - angle finder with magnification - that helps a lot!