Account Grouping

[Michael T. Garrison Stuber]

Currently in GNUCash you can only group like accounts together under an 
account of the same type.  Generally this makes sense, but 
(architecturally) does it have to work this way?  I'll give a scenario here:

I travel for business for the company I work for.  As such I have travel 
related expenses and travel related income (reimbursement).  The expenses 
aren't truly mine, nor is the income truly income.  I would like to have 
top level account with income and expense both under it.  The advantage to 
me as a user is that I could quickly look at it and determine whether the 
company owes me money (expenses higher than income) or whether I have 
misreported (income greater than expense.

In one sense here what I am looking for is the ability to maintain multiple 
sets of books in the same GNUCash file.  One "business" would be my 
personal finances, the other would be my work finances.  Yes, I could track 
these things with separate file, but I'd really like to be able to see this 
all in one place, and transfer money between the two sets of books, as they 
are often connected (for example, I "loan" money to my company when I pay 
my expenses out of personal funds and than pay myself back when I am 
reimbursed).   Thoughts?