I am partial to Nikon personally. Regardless, it is imperitive that you are able to attach aftermarket lenses.
I purchased a wide angle lens from eBay for around $30 and it made all the difference in the world.
Additionally, if you have a camera that will accept lenses, you can purchase a 360 degree lens for it and do your own Virtual Tours.
With that said, $350 is not going to go far if you want a high grade camera. However, it will buy a stellar snapshot camera. For that purpose, I recommend the Casio Exlim. I recently picked one up and immediately fell in love with the thing. It is much smaller then my wallet (in size ... It retails for about $300) and fits nicely in my pocket. It weighs next to nothing and with a whopping 10 megapixels it takes print-worthy photos, no problem. It is a good choice, if you want a camera to take with you all the time.
One last thing regarding megapixels ... Although Megapixels are the yardstick by which the quality of your images are judged by. HOWEVER, the size of the CCD chip (Charge-Coupled Device) is also extremely important. With a larger CCD chip you will get a larger Field of View. This will allow you to do all sorts of things if you really want to get serious.
Yes, I realize that I am a complete nerd ...