HR isn't Helping Me!

Dear Experts, I just read your article on why HR isn't that into you. I have a similar problem that has left me standing at the fork in the road. I have an internship and a job prospect and both second round interviews went great. I just got offered the internship with one agency, but I am absolutely obsessed with the other agency and the possibility of landing my first "job." The latest with the job prospect is the partner of the agency e-mailed me and wants me to come down and meet the rest of the people there once things aren't so hectic (no time frame). I feel if I take the internship, I loose the job prospect. Do I call the place and lay the cards on the table and tell them how passionate I am about their company, or sit tight and not hassle the HR department or the man who I have been in contact with? Our Twitter Advice Project (T.A.P.) is no longer an active campaign. To find an answer to the above question, please use the "Search" box in the right-hand column of this website.