I have tried a few telephone call recorder apps on my droid X and they just don't seem to work. They are great when the Doctor calls with test results when you are driving.
There are lots of different recording applications on the Android Market Place.
You can go to the Android Market Place on the device, then go to search to find these applications.
Here are two of the higher rated call recording applications:
Android Market Place Applications are not provided by Verizon Wireless and direct support for applications is not offered.