Just wanted to amend my post from earlier. Had a chance to speak with the owner of Zaps last week, and despite what you might read in the blogosphere, he actually is Polish and excited to share a popular sandwich/snack from his country with the good folks of Allston. You can read more about the type of sandwich - that does in fact look like a french bread pizza at:
The interior has also been completely renovated and includes a brick facade below the counter and three huge flatscreens as menu boards - they definitely didn't skimp on decorating. Especially considering it's a a takeout joint that sells 16-inch sandwiches for $4.