I would recommend:
1) Panasonic Lumix DMC GF3: Here
It comes with a 14-42mm lens which should be plenty wide for you.
You could get a GF2 or GF1 for less if you don't want the newer model.
2) Sony Nex-3: Here
It comes with a standard 18-55mm lens which is also wide enough.
If you're going to spend more than $400+ then it would make a lot more sense to just go for a DSLR since you'll be getting a lot more quality for your money. The only disadvantage with using a micro four-thirds camera instead of a DSLR is it doesn't have as much shallow depth of field, which isn't a problem if you're not planning on doing portraits.
Here's a LINK
to a Flickr group so you can get a look at what a Micro Four-Thirds camera can do...