1 Terabyte drives are popping up all over - here's Seagate's announcement:

The drives come with either SATA (for consumers and enterprises) or SAS (for enterprises) interfaces and have an MFRP of US$399, which is the same as competitor Hitachi GST's 1TB drive.

Ponder that for a moment. I clearly recall buying a second 40MB drive back in the late 80's, when my first 40 MB drive was filling up. I also clearly recall thiking "I'll never need more disk". I'd say that again, but I know better. I'm editing audio these days, which chews disk. My daughter edits video, which chews mountains of disk. I can only imagine how much disk space we'll be chewing 3 years from now - but it'll be a lot.