Historical version 2 of Two Skein Ideas (view current version)
Scarves are about perfect for two skeins.
I made one for Sean's sister in Noro Cash Iroha. Two skeins was enough for a medium sized scarf, and I kept some back to make a long fringe. I used some odd bits of mohair and tape yarn with the main yarn in the fringe, to make it extra-pretty.
Two skeins will also make a decent sized bag. I'm concocting one now from left-over Rowan Big Wool.