sounds like power steering fluid to me, dont let it drip on your block paving, near impossible to getout!

i got mine from Fiesta centre,
http://www.fiesta-centre.co.uk/ , second hand one's are £60, or brand new ones are £120, £15 postage, but ull need to ring to see if they've got an Si in.
i had to carry round a bottle of power steering fluid in my car because you dont wona let it run on empty cos it will burn your motor out, which will cost even more to replace.
get someone to have a look at it cos it may just be a worn 'O' ring or a loose pipe.
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RIP Ben. Gone but not forgotten.
SportKA - I've driven one and its deffinately a Girls car
Ford Fair 2010 0-60 7.45 secs Trek 4100
Save the trees, wipe your arse with a Cosworth