Sorry for creating two posts back to back, but I felt that these were two separate requests and warranted individual threads.

When I view my own decks, I can see the cost of the deck, as well as the cost of cards I don't own (usually, if I've built a deck, I own the cards, though).

One thing I would love is to be able to view someone else's deck, then be shown which cards (and how many) I currently have in my inventory, and then the cost of the cards that I do not currently own.

Possible?

Thanks.

Obviously not ideal, by any means, but there is one way to do this currently.
In the upper-right corner of the page for each deck is a Tools menu. In there is a link to Copy the deck, which will copy it over to your profile where you can view it and compare it to your current inventory as described.

Again, definitely not ideal, but it gets the job done.

That is what I've been doing. But you're right, it's not ideal at all.