One feature I miss: select all only selects the items on the first page. Maybe I get too many calls, but when I have 500+ items in the inbox and I want to clear them out, it's a hassle.
I can second this. Had to install a script to automate this. You would think that Google could get this implemented without too much hassle given that's the behavior in Gmail.
MMS.
MMS goes to email, if you have SMS to email enabled. Does not show up in GV however.