My initial reaction was one of annoyance, but after several days I decided to do something about it so I went searching on Google. Not surprisingly, I found several solutions but most were either for versions of Ubuntu too old to be of use or too off base to be correct. Until I stumbled upon a solution that pointed me in the right direction (I can't find the link now, otherwise I'd post it and give proper credit).
Here's the solution for Ubuntu 8.10 (a.k.a. Intrepid Ibex)
Click Applications > Accessories > Passwords and Encryption Keys

Click Edit > Preferences.

You will be presented with a Password Keyrings tab with a "login Automatically unlock when user logs in." option. Highlight that line and click on the "Change Unlock Password" button.

Enter your current keyring password then enter your current user password and click Change. If you do not enter your user login password, you'll still be asked to unlock the keyring after logging in.

Done. Click "Close" on the remaining windows. The next time you log in you will not be prompted for your keyring password.