If this is a repost, please calm down then alert the mods....
Feelin suicidal, I went to Jack in the Box for lunch today (Brea, CA). Couldn't help but notice a sign on the marquee/menu about this deal:
On 2/23/10, buy a large drink and get a free grilled sandwich. I was going to take a photo with my cellphone but the matronly manager was giving me the evil eye.
However, the corporate site, the opening splash page confirms it (wait for splash page to finish loading).
Didn't see it posted on FW after a quick search. A Google search showed they ran a similar deal last October.
Details are vague but I believe you could choose either sandwich.