For the cost of a (plastic) Trezor, one can purchase a cheap Android smartphone, install cyanogenmod if desired, then install Mycelium. While this arrangement has flaws compared to a Trezor, it also has advantages, and it's certainly good enough to produce paper wallets, or to keep turned off as a cold storage medium for modest funds. Anyone who has a lot of bitcoins should currently be using a paper or other cold-storage wallet, but if that's too cumbersome, at least they can go the dedicated-smartphone route rather than keep their bitcoins on a web wallet while waiting for Trezor.
No, I don't like that idea. The problem is Android is still an operating system and therefore vulnerable to malware. It also wasn't built with Bitcoin in mind. You tell people it's safe for them to use as cold storage for 50K then the recent Android bug with random number generation can wipe them out. The Trezor is designed for security and Bitcoin specifically so it's far more unlikely to have such a glaring software flaw.
If people are storing substantial coins then they shouldn't mind spending either the time or money necessary to ensure their coins are safe. For about the same cost they can buy a simple dedicated laptop to use with Armory and be assured their coins are safe, including easy paper wallet backups.
I agree with the notion that using an Android phone is a flawed solution, but then all "solutions" to this are flawed, and the least-flawed solution remains paper wallets. Storing 50K on your phone is unwise, but frankly I wouldn't trust that much to a Trezor either, or even a laptop with Armory; physical and inert media seems to be the only method with a low enough risk.
Android/Mycelium has it's own advantages the other solutions do not. So does laptop/Armory. And so does Trezor. Unfortunately, Trezor isn't out yet, and as far as Mycelium vs. Armory, I'm not convinced bitcoins sitting on a dedicated smartphone are significantly less safe than bitcoins sitting on a laptop with Armory,
especially after the difficulty of setup and use is factored in. Still, I completely understand those taking a different stance. (And hey, one could always hedge their bets and do both.)
I think we at least agree that paper wallets remain the most secure storage method for now.
Blockchain.info should be used as a convenient spending wallet, not storage wallet.
I disagree. While I think it's true no one should use it for savings and storage, I see no reason to use it at all any more, even for spending, if it's at all possible to avoid doing so. If you have a home computer, there are good clients available to use. If you have an Android smartphone, the same is true (I just think one happens to be better.)
If someone cannot learn to use one of those clients to spend bitcoins, or cannot afford to do so, or just finds them too inconvenient, then I would question whether they should be using bitcoins in the first place. Maybe next year, or a couple of years from now, but not at this point, sadly.
