If you think a new web app comes out nearly every day, you’d be partly right - it’s actually closer to about five per day. Google has popularized the practice of crowd-sourcing product development by releasing “beta” versions of unfinished products into the world for its customers to play with. I admit to being a bit of a beta geek; the lure of being the first kid on the block to know about the coolest new web toy is irresistible to a futurist who loves to see around the corner to the future. There are thousands of betas in the marketplace, which made finding a handful of them to feature for this week’s Friday Five more than a little difficult. That said, here are five products in beta that we think are worth keeping an eye on.

Grand Central
Grand Central seeks to solve an increasing problem in the mobile age - converging multiple points of contact into one. The basic idea around GrandCentral is “one phone number for all your phones, for life.” The service provides a single number tied not to a phone or location, but to you. According to the website, with GrandCentral “you can be reached with a single number, answer a call at any phone you want, seamlessly switch phones in the middle of a call, as well as check messages by phone, email or online.”

(Thomas Friedman’s talk at Pop!Tech, subtitled in Kiswahili)
dotSUB
dotSUB is quietly staging a revolution on the web. Its mission: to make online video content accessible to the millions of non-English speakers by offering open-source translation services. The idea is deceptively simple: think YouTube meets Wikipedia: users can upload videos, films (even TV programs) for either the rest of the world or dotSUB’s team to translate. Translation services are either “closed” (utilizing dotSUB’s team of freelancers) or “open” (posting a video on the site and letting volunteers translate it for free, wiki-style). For a great example of the service in action, check out Pop!Tech speaker talks (called Pop!Casts) which are translated via dotSUB into nine languages.

MetaNotes
MetaNotes is “social graph paper” on which users can paste stickynotes containing text, images, videos, and widgets, creating scrapbooks to track and remember any topic. It won the top “Experimental” website at the 2008 SXSW Interactive Awards last week, the category which tracks “cutting-edge and trend-setting destinations that are pushing the envelope and challenging our perceptions of the web.” While it still has a ways to go (i.e., it really needs private spaces for users to post notes); MetaNotes’ intuitive interface is familiar and user-friendly. And: it plays well with others, integrating with sites like Twitter, Facebook, Gmail, Pownce, and Photobucket.

Google’s Experimental Search
Courtesy of the brainiacs at Google Labs comes the Experimental Search project which offers new visualizations of search results including a timeline, map, or in context of other information types. With these views, G-Tech (the ambiguous but patent-pending-sounding term for “Google Technology”) extracts key dates, locations, measurements, and more from select search results so you can view results in multiple dimensions. Timeline and map views work best for searches related to people, companies, events and places. Info view shows all the data found for each result, to help you select the best choice.

Museum of Modern Betas (MoMB)
Aptly named, the Museum of Modern Betas is the go-to place to check out and track web apps that are in beta. In fact, we think it should be called the Motherload of Modern Betas - since it opened in two years ago its listed over 4000 sites that are in beta, helpfully organizing them into categories such as Top 100, Most Anticipated, Recently Added and by Language. The large number of sites it tracks makes getting in-depth information about each one difficult, but active links are provided. The MoMB is a like a giant playground for the future of the web, perfect for those who don’t want to wait for the new ‘new thing’ to arrive.
P.S. - Last but not least, here’s a bonus track: keep Wello Horld on your watch list; it’s still in alpha and very hush-hush, but I want to go on record as being (one of) the first to say “I told you so!” when it launches.
P.S.S. - If you’re wondering why I didn’t include PMOG as a beta to watch, stay tuned. It’s so cool it deserves it’s own blog post.