If what you call profiles is the thing most people here call character sheets (info for your roleplay characters ranging from basic descriptions to full biography depending on the person), then there's a forum section called Character Sheets that would be the perfect place for making a thread to list your things and link it in your signature.

If you mean something else, like a list of your roleplaying preferences and such, there's no official place for that yet but Mahz has said he wants to integrate that into user profile information at some point.