Research in Motion's (RIM) early attempts at mating its popular wireless e-mail device/PDA with a cell phone didn't turn out as well as the company had hoped. But the BlackBerry 7230, RIM's first color-screen model, is a different story. Offered by T-Mobile in the United States for a reasonable $400, the 7230 combines a GSM/GPRS world phone, a PDA, and wireless e-mail capabilities in a slim, 4.8-ounce unit that doesn't require an earbud to talk on. The only potential drawback is T-Mobile's service; if the carrier's GPRS coverage is not widespread in your area, you'll have a tough time getting e-mail on the go.