Since John Sullivan, a lawyer in Concord, got a BlackBerry nine months ago, he's improved communication with his clients but not necessarily with his wife."It's been known to go off during dinner," admitted Sullivan, who works at the Preti Flaherty firm. "First I duck the dinner roll . . . and then occasionally, I'll look to see who the message is from.

"Once in a while, I'll leave the room to respond."

"Like all addicts," Sullivan said, "I think I have it under control, but my wife doesn't."

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