So I got Mass Effect 3 on Tuesday, but haven't played it yet. Is there a time limit to enter the online pass code that came with it? Also, I unlocked some bonus items for playing through the Reckoning demo. Is there a certain amount of time to retrieve those?

Anyone?

I haven't played any of the Mass Effects, so I don't know, but in general, Online Passes are valid until the code is used, and if the exclusive items are codes as well, the same applies.

The exclusive items are linked to your EA account, no codes for those.