Some things TOR gets you besides texting (which can be disabled).

It loads up your contacts and let's you call from the contact list through GV. You can also dial numbers through the built-in telephony software and call through GV.

It also monitors for missed SIP calls and will then check for voicemails and report those to you.

The One Ring is only available through extras-devel which is dangerous. For Maemo 4.1 I might be promoting it soon to Extras but Maemo 5 verson needs a bit more work.

Dialcentral thread
http://talk.maemo.org/showthread.php?t=29347
TOR thread
http://talk.maemo.org/showthread.php?p=488632