1. An instant messaging/chat system comprising: an instant messaging/chat client; an application event interface to said instant messaging/chat client, said interface having a configuration for receiving application input and output and integrating said received application input and output with instant messaging/chat content for an established instant messaging/chat session; and, an instant messaging/chat server configured for communicative coupling to said instant messaging/chat client, said server having logic for receiving application input from the instant messaging/chat client as a posting to the established instant messaging/chat session between instant messaging/chat clients, the application input is an application command distinguishable from conversational text, for forwarding said received application input to a designated external application, for receiving application output from said designated external application via a second instant messaging/chat client as instant messaging/chat content in said established instant messaging/chat session, for determining in said established instant messaging/chat session whether instant messaging/chat clients participating in said established instant messaging/chat session process said application output in a native data format and which of said instant messaging/chat clients process said application output only as a session processible textual representation, for converting said application output to said session processible textual representation for said instant messaging/chat clients determined to process said application output only as a session processible textual representation, while forwarding said application output in said native data format to instant messaging/chat clients determined to process said application output in a native data format, and for posting said converted application output as content in said established instant messaging/chat session for instant message/chat clients determined to process said application output only as a session processible textual representation.