Not sure why you deleted your blog entry (I had to read the cached page on Google), it was your experiences and expenses of what you spent with reasonable suggestions trying to help other mothers avoid the same expenses.
Your comments and posts just go to show that you, like most new mums overbuy 'stuff' for the new baby whatever the method of feeding.
I found the only truly additional costs I had was nipple cream (£9) and washable breast pads (£10) but the pads have been used for three babies to date so they have paid for themselves by now.
I don't include nursing bras or clothes as an additional expense, as I would be buying these items regardless.
That said I did overbought things like a pump, but in my case it became essential when I was taken into hospital without my newborn.
All the best with your blog and your new baby :)