Steam: Bnlgoi
PSN: Sheepdragon
Note: I've never played anything online on PSN, I just have it to download shit.
I also have a Xfire account, but I haven't used it in ages. My nick there is Scream for the Cream.
EDIT:
Oh, and one of my drives just died, so I'll have to redownload every Steam game once I get a new one. Whoopedefuckingdoo.

.

My Steam ID is honorbuddy.

This is a great thread, so let's keep it going!

My PSN ID is: Someguy52

you are welcome to add me, you can also view my portable ID here

http://mypsn.eu.playstation.com/psn/profile/Someguy52.png

Only have Steam: Mamutte
Add guys!

Steam: TheCheese33
Xbox Live: TheCheese33
OnLive: TheCheese33
Battle.net: TheCheese

Steam: jlg6184
X-Box Live: jlg6184 (currently only Silver Member)

Steam: Calamityx51
XBL: Calamityx51
PSN: Calamityx51

It's so much easier having to not remember different usernames, even if in recent years I've switched to using CR when normal Calamity isn't available. :P My only request with an XBL or PSN add is to just let me know you're from GOG and I shall add back. :3

Steam: Ubivis
Live: BuzzingUbivis
more to come later

Steam: DarkOmegaX
GFWL: cfveliz
Raptr: cfveliz

steam: ThermioN
psn: ThermioN_AUT

If someone wants to add me to his/her friends, please add a note that you're from the gog.com forums.

Steam: OriginalDelixe
XLive: Original Delixe
Raptr: Delixe

AudioCG

For everything, literally.

Steam: dpaxton894 (I think)
Xbox Live: reaver894 (rarely on cause it signs me out every ten frigging minutes so even if I wanted to I cant play a single MP game)

Steam, PSN, Live (probably): evilguy12