We've all been there -- you need to get in contact with your friends; they're not answering their phones. You know they're online, but you need to have an actual voice conversation. Well, rejoice, our frustrated friends -- for Nimbuzz plans to bridge the gap between instant messaging and cellphones. Its currently-in-beta (no surprise there), free-to-download app supports "more than 500 [Java-enabled] mobile devices" and allows you to call and initiate voice chats with your buddies on Google Talk and MSN / Windows Live Messenger. In addition to keeping you on top of your online friends, it lets you make international calls to other cellphones at local rates, so long as whomever you are calling also has Nimbuzz installed on their device. Besides that, you also get free text messaging and the ability to have Group Calls with up to five buddies on your contact list regardless of how they are connected, and Nimbuzz says it is currently working on getting your AIM, ICQ, Yahoo! and Skype friends into the mix. Now that you know, we hope you don't mind as we run and make a few overdue calls to our pals across the pond and in the far East.