Change Column Referenced In Formula Based On Date

I'm trying to create a list that references an existing data set where I have staff listed month by month and based on today's date, imports only if there is data in that column. I have figured out how to check if the cell is blank or not, but what I want to do now is change the cell that is referenced in the formula based on the date. Here is the format of the spreadsheet I'm working with:

A
B
C
D
E
F
G
H

[code].....

In this case, the "Team 1" and "Team 2" and "Team 3" references what team they are on that month. If it is blank, they aren't with the company any longer. The formula I am using is intended to import this data elsewhere, and is formatted like this:

=IF(ISBLANK(B2), "", A2) - My understanding is that this checks to see if B2 has data, and if it does, it inputs the employee name (A3) in that cell.

My ultimate goal is to be able to change the column referenced after the "isblank" calculation based on the date. So if today is April 2013, I want it to check B2, but if it's December 2013, I want the formula to check J2. Is there a way to do this? I don't mind if it's two steps (like if I have to put the date somewhere in the spreadsheet in order to run the calculation), but ultimately it would be the type of thing I could do that would leverage the existing data set so that I don't have to maintain two different spreadsheets of information.