I purchased my first Mac in January of 2007 and have always been dissapointed (shocked, really) that the Mac OS refuses to write to NTFS formatted drives. However, as of yesterday, I am no longer dissapointed, thanks to Paragon's NTFS for Mac utility.
http://www.paragon-software.com/home/ntfs-mac/
I tried editing files over an NTFS drive via that utility and worked like a charm and purchased the product instantly. Highly recommended and 5 cows!
- Aanarav