All the posts about TC dying has scared the shizzle out of me as I bought mine solely to stream my very large iTunes library around the house. I have now had to rush out and buy a back up drive as I am reaching the 18 month marker soon.
If it dies I'll be demanding a new one (hopefully the new model is ok?) from Apple as this is clearly a common fault and the product should not have been on sale.
The thread at Apple Discussions is amazing in that over the 32 pages there must be an average of 5 new dead TCs per page. It literally reads Post 1. Mines dead. Post 2. Mine too. Post 3. Mine died today etc.
Not impressed Apple!
I'm not sure if the model is the same or if it's updated. I can't remember if the old TC had support for wireless N networks but this one does, you can make a 5 ghz only wireless N network which I don't really recall with the one I bought in early 2008.
So far it's performing the same as the other when I first bought it, but it still runs very hot.