Well, what board to you have?
The best bet is to go with one of the mobile Barton chips (2400+, 2500+, or 2600+, low wattage) as that gives you the most overclocking headroom and unlocked multipliers.
Stay away from the Palomino's, and only get a T-bred if your board only supports a 266FSB chip and you don't plan on overclocking much.
With the right board and RAM, you could easily get 2.3-2.4ghz (or more) with one of the mobile chips. That's pretty good considering the stock speed of the 3200+ is 2.2ghz.
"In the Box" probably means its the retail version of the chip, and comes with the AMD stock heatsink and fan.