Yes. But for heaven's sake, don't.
The Replicant developers (I'm one of them now; I just joined) are working
hard to bring you a mobile device without proprietary software as much as
possible. If you install proprietary software on your device, there is no
point to using us. You might as well use CyanogenMod, which comes with that
firmware pre-installed.
To answer some other questions, mobile devices do not have a "Wi-Fi card"
like desktops and laptops. They have a modem, which controls all network
communications (including telephony and data). The modem and the OS interact
through the RIL (Radio Interface Layer). Wi-Fi and Bluetooth will not work at
all without those blobs, under any circumstances.
The good news is, I'm going to try decompiling them. Stay tuned.
