There doesn't seem to be any info to go by anywhere as to size requirements for logos etc.  Any size requirements so you don't throw the whole forum off kilter?

Also, any way to add info about users under avatar?  Like, location, etc?

Thanks

Hi, logos can be any size basically, its up to you and what you want it to be. There are no specified guidelines what that should be.

As far as the text under the avatar goes, you can add some text in your profile page in the "Quote" section and it will show up under your avatar. I'm not sure if you can add it for other members though, but you can for yourself in your own account.