Armed air marshals on all transatlantic flights?

The TSA is trying something novel at Denver International Airport: When you reach the security checkpoint, you can choose which line to enter--expert (travel frequently, know the rules), intermediate (not quite an expert, but it's not your first time at the rodeo), and beginner/people who need more time (families, special needs). In a cute touch, they're using traditional ski iconography--black diamond for expert, blue square for intermediate, green circle for beginner. Evidently, the system is working, just as it did during a trial run at Salt Lake City's airport. Thanks to The Travel Insider for pointing this out; he saw it in The Denver Post.

What travel-related innovation from the past 10 years or so has made your trips more enjoyable? We've narrowed down readers' submissions, and now's your chance to vote. The most popular will be featured in our upcoming 10th anniversary special issue—written and photographed by readers like you. UPDATE: THE POLL IS NOW CLOSED. THANK YOU FOR VOTING. HERE ARE THE WINNERS (with some quotes from readers): 10. Online maps MapQuest, Google Earth, and other online mapping tools make any first-time visitor a seasoned traveler before he or she even arrives in a place. 9. Digital photography You can "take hundreds of photos" with a digital camera and "see right away whether you got the right shot"—so you don't have to "pay heaps of money to develop a ton of photos that didn't turn out." 8. Online flight check-in Nothing has helped "shorten wait times at airports" like the ability to "bypass lines at the ticket counter" by checking in for your flight on the Internet and "printing your boarding pass at home." 7. GPS navigation Driving is so much easier with a global positioning system to show you the way. 6. Worldwide ATM access Being able to withdraw money from your bank account anytime "on almost every street corner in the world" alleviates the stress of "running out of cash" after "the banks have long since closed for the day." 5. Cell phones Having the option of "checking the hours of a tourist attraction," reserving a table at a restaurant, or "making a hotel booking from the road" is a "huge travel blessing." 4. Global Internet access A "cheap and convenient" way to keep in touch when you're traveling, the Internet is available today even "in the most remote parts of the world." 3. TripAdvisor With "real people" sharing their "unbiased opinions" about hotels, restaurants, and tourist sights, TripAdvisor offers travelers the kind of "detailed information that guidebooks never have the space to include." 2. Online travel booking Before the Internet, travelers were "limited to brochures, a few books, and travel agents" to help them plan and book their trips. Now, with websites like Travelocity, Expedia, Orbitz, and Priceline, "anyone can be their own travel agent." 1. Roller bags Unlike "the old suitcases with four wheels and a strap," today's roller bags have retractable handles and two wheels—"a simple concept" that keeps them from tipping over easily. "People of all ages and physical abilities" can now "move quickly through busy airports without having to carry heavy luggage." These bags have "changed absolutely everything" about travel. See more reader comments below:

Up until three years ago, adding a Saturday-night stay to your itinerary would dramatically cut your airfare. But in 2005, in a much publicized move, Delta simplified its fares. It stopped charging extra for advance-purchase tickets that return on weekdays instead of weekends. Other airlines copied the move. The low fares you saw advertised on the Web didn't have Saturday-night stay restrictions, as a general rule. But that changed recently. United, Delta, and Continental have recently brought back to life requirements that you must stay on a Saturday-night. The rule isn't applied to all tickets, but it is being applied to tickets on many popular routes, such as between New York and Houston. American and Northwest have also rolled out the policy on a more limited set of routes. The news was first reported by TheStreet.com. Our advice: Once again, advertised fares may come with a Saturday-night stay catch. Be flexible in picking your travel dates, whenever possible, because you may save hundreds of dollars.