Do any members use an IPad in practice?

I run a small accountancy practice and have been contemplating whether I should buy an iPad, but can see little justification, as there are not many apps (in my opinion) that would assist me with my day to day business.

Do any AW members use the iPad in their business?

I do not mean just to surf the internet,emails or music etc, but as a "Business" tool.

If you do, please tell me what useful apps do you use to assist you with your practice

The only practical use I thought of was if I am using documents using "Google Docs", where I would be able to create, save and retreive documents when I am not in the office or when I am at clients.

Sorry if this has already been asked before, but I could not find a thread on this subject.

Thanks