I have a land line telephone at home, along with a really old cell phone. I'm thinking about ditching the land line and going cell only on a smart phone (I'm looking at the Motorola Droid). Has anyone else here gone cell only? If so, what do you think about it? There are a few edge cases I'm mildly concerned about in migrating to a cell only scenario:

Emergency Contact at Night

Let's assume someone else needs to get a hold of me late at night. Do I simply keep my cell phone on all the time? I'm assuming I would (it would be connected to the charger overnight). With a land line, this is obviously not a problem.

Loss or Theft of Cell Phone

Suppose the cell phone is either lost or stolen. Replacing it is a no brainer, but in the mean time there would be no fallback plan (right?).

Cell Phone Outages

Rarely, cell phone outages occur (say, from a hurricane). This is, admittedly, an extreme edge case. Land lines can similarly go out in these cases. But what is the fallback plan for outages? Is there one?

I know these are edge cases, but I'm trying to think about all the possibilities before I make the plunge. Any other advice on going cell only?