B-School

I have a question for the B-schoolers, aspiring B-schoolers, former b-schoolers:

I am a senior graduating this may, I have a FT offer in IBD at BB. I have only two classes remaining to graduate, if i were to just take two classes this semester, thus being a "part time" student so that I could make some $$$ with a part-time job, would this be looked down upon when I apply to B-school down the line?? I would like to go to a HBS/Wharton/Stanford

Thanks a lot

For those of you who are in the application process, are currently in B-School, or have gone through the B-school process and have done stints in banking and PE:

I am starting full-time in IBD this summer at a BB firm that I previously interned for. I figure I might eventually go back to business school whether it is after banking or after PE, and had a question about the GMAT.

For people who have gone to get an MBA 2-5 years out, would you recommend taking the GMAT while you are still in college? I figured it may easier this way since you are in an academic environment

Also, how long can you use your scores for admission purposes after taking the test?