I was wittering on another thread about needing some product shots taken for my website. As you can guess this is a HUGE market because everyone with new internet products needs product shots for their websites!
There is a company I know for example in the UK that does just that for you:
http://www.packshotfactory.co.uk/
Anyway - you can also buy nifty little gadgets to get the correct lighting as here:
http://www.emedigital.co.uk/index.htm
or I suggest the cheapskates version here:
http://www.ephotomaker.co.uk/
Then all you need is a decent digital camera etc. Nice thing is even if you are numpty, if you keep trying and adjusting you will get the shots correct I think!!!
I suspect the trickiest part of the equation will be finding your clients, but might get some bits and pieces off me to start you going!