(all available in super large size - so click em to see full sized!)
I took these photos on my Sony A100 using a set of screw in macro filters that I got for my birthday in November. The quality is great (unlike my photography skills!), but it's a bit of a pain having to swap the filters around to get the different focus levels (my set contains a 4 different filters of various focus levels that you can mix and match).
I can't afford a dedicated macro lens yet as I don't do a lot of macro photography but these are more than good enough for the job until I can (plus I only paid £30 for them from ebay!!)