I am sorry to inform that there is a problem with the extras repository and you won't find the application on the application manager until it is fixed. Clicking the "install green arrow" will not work either.
Unfortunately for now the only option is to enable and install from the other repositories (extras-devel or extras-testing) or download the deb file and install the dependencies "manually".
More instructions on how to install at: http://maemo.crochik.com/home/mycontacts/install

love this app, installed through faster app, works like a charm, but why it starts up on main desktop when phone had a reboot? i prefer starting the app myself , can u set this as option?