So I picked up a Raynox dcr-250 which I am going to couple with my Tamron 90mm to get more magnification for my macro. The Raynox is a great little add on that can give a normal lens the ability to shoot macro. I have read coupling it with a true macro lens can give quite interesting results. I will post some pics when I can.
http://www.raynox.co.jp/english/dcr/...exdcr250eg.htm