We are aware of it for sure, James is the main man on this subject though and he's been travelling today.
Now I have an idea, not sure it'll work or not, but assuming the encrypted private keys and public keys are all in order in the json file, wouldn't it be possible to split the file into several smaller json files? That way you could import 1/10 of your keys at a time for example?
And if you have several different accounts in one file then I'm fairly certain you could separate them and make one file per account, just keep the password checksum at the top for each file.
@xeroc does that make sense?