Hi There,
We have signed no of applications and our no of applications are live. Nokia gallery, portfolio tracker, mobile ticketing and many other.
If you want self signing then the task is hardly few hours but if you wish to get a certificate from certifying authority then you have to bear that cost.
We have done this couple of times so we can ensure fast work.
In case you wish to know more. We will be happy to provide further details.
Regards
Technoveta Team