I bought a Yongnuo 460 speedlite off ebay and it arrived today, this is my first 'speedlite'. Happy with it so far and considering getting some more of them (or something similar). Below are the results of 20 odd minutes of trying it out.
I don't have a Macro Lens, just some Hoya Macro attachment rings. The baby shrimp in that shot are just under .5cm.