That said, I've never had an issue with my iPhone's youtube app either, so I don't know if there's something fundamentally different about my network and yours.
I don't have an iPad yet, but I do use my Cuisinart bread-maker twice a week to make delicious and substantial wholewheat bread for way less than you would pay at a store.
http://www.nytimes.com/2006/11/08/dining/081mrex.html
If you want to get all bread-geeky, this stuff is even better when you've got yourself a starter (I have three kinds :)
Honestly, though, looking at some of ways I've seen people using them in the very short time since its release leads me to think it is going to be a likely purchase in the near future.
A bread-maker isn't the same because it only does one thing. It makes bread. An iPad/iPhone does a million things and I am still discovering new ways to use my iPhone.
Now whether the same kind of usability translates from the iPhone to the iPad is yet to be seen, and I'm a little skeptical if only because of the reduced portability, but it is hardly on the same level as your bread-maker.
The same bread-maker argument could be made for a laptop, or a PC, or any number of things
Oh, and I sold my Kindle after 1 month as I prefer to read paper books and they're cheap.
So some gadgets have a 'useful' use, and some aren't really necessary.