For the last couple of months I have been using a Livescribe smart pen - in a nutshell, it records what you write, and can (optionally) record audio.
Using the Livescribe software, you can download your notes (and audio) to the computer. The software performs OCR on the handwriting, allowing you to search your notes. You also have the ability to play back the audio at a specific point in the notes.
The pen also has a documented API and app store (which is cute).
Evernote is a cloud based storage application that allows you to synchronise data between all of your windows, mac and ios/android devices. It also suppors search and image OCR.
It has cute little browser plugins to "clip data" into Evernote and a really good client application (which runs on both Mac and Windows - unfortunately no Linux client at present).
The most recent Livescribe software update allows you to sync your Livescribe notes (both written and audio) with Evernote. I think this is a match made in heaven.
Evernote really is the missing link with the smart pen - it allows you to easily add typed notes to your hand written ones (which I find handy for meeting minutes).
Anyway - amazing technology that I'm finding very useful on a day-to-day basis.