Help us improve

I have used your system for over five years and think its great. However, I really need some help in the form of a simple 'notes' box on the sales type pages. It doesn't need to be anything fancy, just somewhere I can record notes about the product and notes about if it might be on order from suppliers etc.
Please can you sort this for me? Can I talk to someone about it?
I'm sure many others would benefit from this too and it must be easy to do?
Thanks and regards
Dave