Dad will always appreciate the dress shirt or cologne that you normally give him for Father’s Day. But this year, why not break from tradition and give him an electronic gift that will help him step squarely into the 21st century? Though shopping for a Father’s Day gift can be a challenge, the following ideas from Vonage, the fastest-growing broadband telephone service provider, will help dad have a high-tech Father’s Day. * The gift of on-the-go entertainment: If your dad is a music lover, an MP3 player will give him…