Create a day-count-total starting from a set date that will increase by one each day

I'm no wiz when it comes to Excel, so I hope you don't mind my n00bness.

Column H is the date something was sent out.
Column I is the date something was returned.
Column J is the total days between. (I1-H1=J1)

I want Column J to calculate the total days from the date something was sent out to the current date if Column I is blank.

Example:

(H= 06/17/13)(I = 06/24/2013) therefore (J = 7)
(H= 02/01/14)(I = N/A) if it was today, (J = 5)

Anyone know how to write a formula like this?

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Could something like =IF(I1="",TODAY()-H1,I1-H1) work for you (provided i have your dates in the correct order)?

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EDIT: Thanks for the add to my reputation!