I've been playing with the 'new' (to me) custom fields feature. Very cool. Especially how you can scope them to 'global, per project or per issue type'.
We can also customize issue types, priorities and resolutions.
I was wondering if it's crazy to dream of a day when JIRA might allow 'scoping' of these built-in fields as well?
It would be very handy. We could open up our JIRA install to serve external customers that only wanted to have one issue type (IE: a complaint!)
I think with many end-customers, having to select amongst bug, task, inprovement, new feature is daunting.
And hey... while we're at it... the fields that appear on "the next page" like version, environment, assigned to, etc... Could those be configurable as well
Does it sound like I'm wanting JIRA to morph into a CRM-like application? 
Improvement
Open
Minor
Custom Issue Types + scope
I said: "Could those be configurable as well " (without a '?'.. grrr).
I meant by that:
if they choose 'bug' then the fields that need to filled in are:
a, b, c, d, e, f
but if they choose my custom issue type of 'complaint', then all they get is :
a, b, c and my custom fields called p,q and r
Yah, I don't want much, really.