Having just gotten a phone I can tether with I must write this.
Previously I was envious of the iPhone for one reason: Internet without WIFI. It was annoying to be on the road and need to find out something, say a gas station, hotel, whatever and not be able to because I had no net connection.

It was annoying to be on the road and not know where the traffic was because...I had no net connection. Now I don't think about it. It is so liberating.

To talk to a friend and decide to meet up and to be able to just load up MaemoMapper and get the route right now (with traffic reports) is perfect!

I feel as if I wasted half the potential of this tablet of mine by not getting squaring away this tethering option before. If you are a new user of an IT do yourself a favor and get the tethering activated.

Now it does kind of suck right now that my Solio does not have the proper plug for the phone I purchased, but that can probably be remedied later.

Now I would love to have a Boxee app for the N800 but that's an entirely different conversation.