Hello

I am preparing a number of apps for physicians, hospitals, pharmacists
& other health-care providers.  I began my development using
php/postgresql which has been working well enough, but as my apps have
grown I quickly see that I need to make some changes to make them
maintainable, customizable and scalable.    While there are certainly
a number of improvements I can make with my php apps to improve my
coding/app design (which I am actively doing) but the idea of Rails is
appealing to help facilitate good code design, maintenance, testing,
etc.

My question is Rails appropriate for a potentially large application
with eventually hundreds of concurrent users, loads and loads of data
coming in and out of the database, requiring robust security?  I have
seen the following example Rails apps.

http://wiki.rubyonrails.com/rails/show/RealWorldUsage

But don't have a good sense of how these would compare to a large
healthcare IT solution.
In short is Rails a good choice for my solution?  Are there
advantages/disadvantages that I haven't considered?

I am trying to make good planning decisions early in my small startup
before I lose the ability to make changes quickly and easily.

Thanks,
Dewey
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