Advanced SMS forwarding from a handset

Has anyone come across a really smart, comprehensive ‘SMS forwarding’ solution at all? Here’s what I’m looking for.

I’ve got quite a few different numbers. I maintain them for all sorts of reasons, primarily because it’s necessary for me to have an account on different networks for testing purposes.

People forget what my primary phone number is, so just text me on whatever number they have. I therefore miss quite a lot of text messages.

I’d like to install an application on my phones that, when a text message arrives, forwards it to my primary handset number. (Or, come to think of it, to an email address.) Ideally I’d like the application to use a web aggregator so that the text message can be sent to me from the originator’s number.

Quite happy to pay per text for this.

I’ve seen a few different applications for S60 and the like. Does anyone have a preference or a recommendation?