hi tinky, I had a homebirth with my second child, and am currently waiting for db3 to make his/her appearance at home too- the first homebirth was SO good I had to do it again
things we needed:
floor covering- we used 2 cheapo shower curtains from asda
towels- most people say get dark colours but I was told to use pale so that if your waters go and you're on the towel then they can see what colour it is (ie, if it has meconium or anythiung in it) I bought some really cheap asda ones, but they've washed up fine, so if you have plenty of towels then I wouldn't boither buying any just for this
a lamp- in case you need stitching afterwards.
biscuits/snacks to keep the midwives going (and you)
stuff for you and the baby-
I had a hospital bag prepared in case of transfer and it was actually really useful because it meant I had everything I needed in one place once ds2 was born and dp didn't have to go off searching for stuff.
so the usual things:
pyjamas, sanitary towels, big old knickers, babygro and vest for baby, blanket for baby, nappies