Although it's not phonegap-specific, a lot of Windows developers will start iPhone development by using a tool like phonegap. The easiest way to move to this environment is to use a Macintosh.  For many of us, this is a new world and it isn't obvious what Mac to get.

The typical developer will probably want to use a laptop for their software development.  There are basically two types of MacBooks that you can get:

• MacBook - 13.3" laptop
• MacBook Pro - 15" or 17" laptop

There are some video chip differences between these two product lines but the size of the screen is the basic differentiating factor.  Only you can decide how big of a screen you'd like.  A good way to see and feel them is to go to an Apple store or a Best Buy.

After that, the configuration of the device (CPU processor speed, RAM, disk space) is very comparable to the Windows world.  In general, get as much RAM as you can afford. [Important note: Apple overcharges more for their RAM than any other component; most Mac owners recommend buying the *minimum* RAM from Apple, then upgrading it w/ high-quality aftermarket RAM.] CPU and disk space will be dictated by your particular needs and price.  At least 150 GB of disk space is a good starting point for the development tools that will be needed.  You probably shouldn't get less than 2 GB of RAM for the laptop either.

Development can certainly take place with the MacBook Air - a thinner, most expensive version.

It has also been suggested that a Mac Mini would make a good platform for development.  The Mini is a small desktop Mac.  If you are interested in that type of environment, use the same specs as the MacBook when configuring the computer.

Many, many Mac owners swear by the Apple refurbished route; you still get a full-warranty, perfect and nearly unused machine (often flawless returns from someone who changed their mind or had a trivial software issue), for a 10-15% discount.