I have a skype group for dreamcast games. Its pretty much the "im on" thread but more immediate notification to others. Paste the link in a skype chat and click. If you want to play, just drop a message and if i/others see will most likely play
Invite others and stay active and playing online on this thing will be easier than ever.
skype:?chat&blob=su4B4KcjOR7Mc8X41aH92aHQxGoM0I-ZlzOVQqSICI5FZyZPZk16TqM_f8rBRTxRp9-U148U8RwvPw
Not really for social chat. Its just to let others know you're playing or when you will be.
EDIT: Updated link. Paste in Internet Explorer bar. Skype must be installed