I have my Streak, everything set up, AppBrain installed and downloaded all my apps I had on the X10. I think it is all good, except I know there was an option on the X10 in the settings to only do Updates on Wifi, but I can't seem to find it now.
I got the battery charged 100% while loading everything up, I will charge it up over night and then see how long it takes to drain the charge.
I would like a sleeve type case, like I had with the X10, haven't found one I like yet.