Likewise - I can't say enough great things about Arq. In particular, when I moved to Singapore, I was able to really take advantage of the gigabit line I got (for $39/month), and use the S3 storage that Amazon offers in Singapore. Looking forward to using the Google Storage in Singapore as well...

Ditto. Amazon Cloud Drive is $60/year for unlimited storage, which makes a nice back-end.

Arq supports coldline now. It also helps with creating buckets and choosing from among the new regional and multi-regional storage classes.

Arq sounds almost ideal, except its still intended more for "backup" than "storage". Its more like an Apple Time Machine.

From what I read, you can still offload data from your local machine by choosing to "archive" a directory.

But thats an extra step and I haven't read how it handles conflicting directory that are created in the future after archiving the original.

That's an interesting use case. You ought to email them and ask about it!

My goal is just two off-site backups (AWS and Google).

Arq actually already supports the new Google options, as long as you create the bucket manually first via the Google Cloud console.