Issues with "Verifying Source Code Authenticity"

I'm trying to verify the source code from Armory, and am getting errors. Any help would be appreciated. Please see the steps below for what I
have done to this point.

Steps

Code:

git clone git://github.com/etotheipi/BitcoinArmory.git

Code:

cd BitcoinArmory

Code:

gpg --recv-keys --keyserver keyserver.ubuntu.com 98832223

Output from the above command

Code:

gpg: requesting key 98832223 from hkp server keyserver.ubuntu.com
gpg: key 98832223: "Alan C. Reiner (Offline Signing Key) " 6 new signatures
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg: new signatures: 6

Next Steps

Code:

git tag -v v0.90-beta

Output from the above command

Code:

tagger Armory Technologies, Inc 1385490661 -0500

RAM-Reduction, Backup Center & Msg Signing
gpg: Signature made Tue 26 Nov 2013 01:31:01 PM EST using RSA key ID 98832223
gpg: Good signature from "Alan C. Reiner (Offline Signing Key) "
gpg: aka "Alan C. Reiner (Armory Signing Key) "
gpg: aka "Alan C. Reiner (Armory Signing Key) "
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.

Obviously, I'm doing something wrong, since there's a warning message above. Can anyone help me please?

OS
Ubuntu 12.04

Thank you in advance!