Below are five of the newest startups according to Killer Startups for the period ending May 18, 2008. Check out previous Killer Startups posts.

Streema - Social Networking and Radio Combined

Streema is much more than just a listing of radio stations. This site has taken music via radio and combined it with social networking to create a community of friends and radio listeners alike. Numerous genres of radio stations can be browsed, and users can also search for a specific station based on location. Once users have registered, they can tune in to their favorite radio station, share thoughts and opinions on music with friends, and link up with other users with similar interests and tastes.

Wuapi - High Def Videos Put YouTube to Shame

Wuapi brings you high quality, high definition images. The site is similar to YouTube—you’ve got all the regular social accoutrements that you’d find on any network these days: tags, profiles, favorites, ratings, and the like. Wuapi, however, unlike the Tube, features visually stunning videos. After you’ve seen a video on Wuapi, you won’t want to turn back.

TweetCube - Easy File Sharing through Twitter

TweetCube is a straight forward Twitter app that allows you to upload and post files to your Twitter account. Log in with your Twitter user information, find and upload the image, song, video, or whatever else you want to share, and enter the message you want to add describing your post. The result is a tweet from your account with the message you’ve entered and a Twurl link that leads you to a TweetCube page with your submitted file displayed for the Twitter community to enjoy.

Tengaged - A Less Invasive Game of Big Brother

Fan of the Big Brother series but not one to enjoy being trapped in a house with cameras following your every move? Tengaged allows you to play a less invasive version of the game with other people online. Each game involves ten people and lasts seven days, each day one member of the group getting voted off starting from day 2. People are nominated for eviction based on the comments that they submit to the group and their amount of activity participating in the game on a regular basis.

Witur - Search, Travel, Share

If your first reaction upon reading the name of this review was "oh no, not another Twitter app", don’t worry because Witur may sound like Twitter but that’s where the similarities end. Witur is actually a space for people to share their travel itineraries, read detailed trip suggestions on a Google-powered geolocalized map, ask questions to the trip plan writers and locals and share trip plans with others.