new playbook. some help needed

ok so i just got my playbook. so far its good. but my facebook chat and tcker keep disconnecting while i am on the full site in the browser. any fix for this? and i am very new to the OS. so i wanted to ask if there are any files for apps and games which can be installed on the playbook other than through app store like in android, apk files can be installed. also, i wanted to know about a free torrent client which i cannot find. i want to download torrents on the playbook. so can any one help?