1GB.
I believe it was mentioned in the presentation that the battery would last all day (I might be wrong about that one). But serious battery estimates are somewhat unreasonable to expect for a product that is still 6 months out. The Playbook doesn't have official battery specs out and that's due sometime this Spring (though its been estimated at 4-5 hours).
Thanks for the link

.
But serious now. Why does HP even mention battery life? There are so many configurations that can effect the battery life! Not to mention Flash (just because Apple won't allow it) battery life! Yeah, it will support Flash with all it's great content! But for how long?
Here are a few configurations
-Using the device without WiFi, like music.
-Using 3G in combination with Flash or the mail program.
-Surfing the net with WiFi. Easy to measure even now if you release a battery spec.
-How about watching a movie?
-Playing a game? Is it using OpenGLES? I think so because it seems that porting excisting iPad games only take a few hours... But no mention when you click the specs settings.
Again, why giving this kind of specs if you don't know how the product will behave? Why talk about this during presentation when you really don't have clue? What's a day (8hrs, 12hrs, 24hrs)? About your guess of estimated 4 to 5 hours, well it's a well thought guess! I mean it! But what is this estimated time when I don't know how I'm using it?
I never cought Apple, because of their secrecy and other reasons, doing this with their future iPads/iPhones/iPods.
It's just a sales trick. Not a good one in my opinion! What about all those future Touchpad users -even here on MacRumors- over the world when battery life sucks in six months? I believe users will feel disappointed...
iPad 64Gb, 256Mb Ram, 3G/WiFi, iOS 4.3 beta 3.
I guess we will have to wait. That's the only guess I'm sure of
BTW: Finally we are getting some competition. I welcome it with open arms!
It will be something else that will cause me to buy a new iPad (like real innovation). Thrust in

Even without official specs from Apple I'm sure it will be an evolved iPad 2... The TouchPad technology is nothing new...