Jeff Cutler has never purchased anything from Dot Flowers, but you might think otherwise, reading the Hingham resident’s blog. ”No more driving to the corner to buy flowers and hand-deliver them,” he wrote on his Web page. ”Nope. Now I go online to places like Dot Flowers.com and 1-800-Flowers. I like Dot a little better just because of the personal touch.” Dot Flowers’s ad agency paid Cutler $5 this spring to promote the florist and put a link to its website on his blog, or online journal, short for web log.