I've loved Quotebook on my iPhone since its debut. It's a well-designed app for capturing, organizing, and sharing memorable quotes. I've used it to capture both famous quotes and even profound things friends have said.
Today, Lickability (love their logo) released Quotebook 2. After nearly nine months of work, Quotebook has come to the iPad and supports iCloud sync. It is absolutely gorgeous, and if you have a penchant for quotes, you need Quotebook in your arsenal.