I developed this using a Raspberry Pi and it works pretty smoothly. The only catch is that the first time you look up a public key/easy key it may take a while to look up the balance and build the balance index. After that, it should be able to calculate the balance pretty quickly. So be patient in the beginning.
I only allow the saving of easy keys. Afterall, who can read a public key with font size 3? The only drawback is that you may lose some privacy because all your server keys would be registered with the easy key service.
Future updates:
Suggestions welcome
New Version
v0.2
- Plugin update feature (requires Timekoin Server v3.3 or higher)
View Public Key transactions
EDIT: 3-7-2014 9:52 EST => Uploaded new plugin version