The press release says they have nothing in mind at the moment. Nonetheless I assume that they are not doing this just for the fun of it. We'll have to wait to see what happens. Maybe more information will be revealed on the conference call.
The press release (which came out after my original post - hence my ignorance, and which adds the credit line increase) parses a bit more subtly: "At the present time, we have no specific plans to issue securities under the registration statement."
I have my suspicions, but I agree with you, they are not doing this just for fun. Unless there is a deal to announce -- which I doubt, as it it too soon after the S-3 filing -- I don't think they will add any color on the conference call.