I was inquiring if anyone is developing an app that will allow the user to bill clients on the go? Or an app that will can sync transactions via credit/debit card and the user can then send an email to for the person to confirm the bill.

PS - I am far from a developer but am in need for an app of such.

Sounds risky, why not use the web for this?

Now that you've mention the risk factor it got me thinking. How and what software can I download to track such expenses on my N900?

The best example of what you want is unfortunately only a demo "Qt Mobile Demo: My Budget"

I would suggest a request in Applications since adding functionality to such an interface is easier than actually designing it

Secondly you could try "NoLazy" that is a client for RememberTheMilk: http://www.rememberthemilk.com/forums/tips/7980/
Check it out and see if it fits your financial needs.

Thanks. Yeah, that's the only app I really miss when it comes to Apple. I hope someone will make one soon.

Well just start a "My Budget" or "Budget management application" thread in applications and give the Qt mobile demo as an example.

I'm sure somebody will be interested in developing it.

Regards