I haven't heard of any rumours of Meraki applying for FIPS140-2 compliance (to be specific, FIPS140-2 relates to VPN and crypto).
However the 15.x code train (not available to the public yet) has significant changes on the VPN side - and perhaps those changes might make FIPS140-2 possible.
One significant issue is that FIPS140-2 is given to specific software versions. This would mean you could not upgrade the firmware to maintain compliance. This kinda violates the whole Merai principle where the software is kept up to date automatically for you.
The last part of this year is going to prove to be exciting in this area!