Indeed!
It wouldn't be too much to ask to cache what has been loaded WHILE the app is running, is it? Or even maybe keep it cached w/o the pictures. Hell, they could maybe poll 50 entries instead of 25 and cache it with no problem (excluding graphics).
While I am at this, WHY does mobile safari have to reload a page every time i switch tabs/press the home button and instantly power it up again? It's not only hugely annoying on a non 3g device, it also makes no sense, you should at least be able to set an interval/turn it off...