When searching for holidays - the web's long been a useful place. You can find cheap flights and hotel rooms, rent cars and even read reviews of you accommodation online.

However, last year the web got even more useful for holiday makers. Dozens of Web 2.0 travel sites jumped in to fill new niches in travel planning. Here's a selection of sites (many of them still in beta testing) that might help with your plans.

When you don't know where to go

These sites can help an undecided planner find a perfect travel match.

Best Trip Choices uses a simple yet highly revealing questionnaire to identify which of six 'travel personalities' you most closely match. After taking the quiz to determine your type, you can drill down to identify destinations and activities that BestTripChoices thinks are suited to your preferences. (You're on your own for booking, though.)

Similarly, TravelMuse, Tripbase and Triporati present destination suggestions based on your interests (which you identify on supplied lists or tags); TravelMuse and Tripbase also factor in your budget, and TravelMuse asks you how much time you're willing to spend en route. All three sites provide reviews, maps, and other content, including links to booking sites.

These sites offer some specialised features, too. Triporati's Facebook app lets you find friends who share specific travel-related interests. Tripbase returns costs for its suggested destinations. And TravelMuse provides tools to help you collaborate on travel plans with friends.

If you're considering a cruise or an organised tour, a good place to start shopping is at Travelbeen.com, which debuted in seven countries including the UK last year with the goal of incorporating every travel website on the planet into its 'social search engine'.

One of TravelBeen's more unusual features is its ability to perform searches for travel suppliers by specialised criteria. If you're looking for an eco-tour in Costa Rica or a 'clean cruise' to Antarctica, for example, you can elect to see only companies that adhere to strict accreditation standards. A shortcoming: Though accreditations are noted, they aren't explained. For example, you can call up a list of cruise lines that belong to the International Association of Antarctica Tour Operators, but it's up to you to know how those lines differ from lines that aren't members.

If you're looking for a hotel deal, try DealBase. Its deal analyser technology promises to spare you from having to sift through reams of fine print by presenting the key criteria for each listing - price, savings off brochure price and terms of booking (for example, dates of stay and deadline for booking) - in just three lines of type. Drill down to filter by category or interest (golf, beach, four-star, and so on), bookmark your favourites, and come back to view them as a list. However, the site currently only offers deals from US-based tour operators.

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NEXT PAGE: What to do when you get there

  1. These sites help you figure out where to go and what to do when you get there
  2. What to do when you get there
  3. Help getting organised