Saw your Long-Legged Fly with A70 on NPS, didn't know A70 was capable of such macro work and close focusing.
As for the IS lens, yes it would be nice, but the fixed focal length with the 500D could be a bit of a factor. Does it cause any problems or restrictions? May try out 100-400mm IS + 500D soon, if I get the chance. I'm waiting for Canon to produce an EF 180mm L IS USM Macro. :devil: