Smart idea. Only thing missing on there is point of sale. If only we knew of one…

Regarding POS – I am in the know and can confirm there is at least 1 in talks with OneSaas. So just a little waiting and its on its way.

The Problem with Software as a Service is Fragmentation of Storage
Many companies today rely on cloud storage solutions (such as Dropbox or Sugarsync) and Software as a Service or SaaS solutions (such as Basecamp and Google Apps). The convenience of having your applications and storage hosted remotely gives small and medium businesses the computing ability equal to enterprise-class solutions. What’s more, it’s cost-effective because it helps businesses save on purchasing the hardware and training a dedicated IT staff to maintain servers.
There’s practically a cloud computing solution for any business’s needs. For creating documents and spreadsheets, there’s Google Docs. For storage, many companies and individuals rely on Dropbox, and Basecamp for project management; one SaaS for each business process.
The dilemma that SaaS users have is that their documents, files, and other assets are spread across different services. To modify a specific asset, you have to use the specific service. Your work is ‘locked in’ to each SaaS solution. This situation causes a fragmentation between the different cloud computing solutions that businesses use and will only become more complicated as the services they use increase.
This is one of reasons we developed cloudHQ for Dropbox and cloudHQ for SugarSync. With cloudHQ, you can integrate and synchronize all your cloud computing solutions in one simple service and interface. You can keep your files on Dropbox and Google Docs synchronized and attach them to your projects on Basecamp. You can choose to edit your documents in Microsoft Office if you don’t have access to Google Docs and vice-versa, all the while keeping your files backed up continuously on Dropbox.