We get our wavy flags from 3dflags.com. They have two ways to get a flag - direct link, and download. Direct link flags have a watermark on them, so we prefer downloaded flags. Here's what you do:
- Click on the 3dflags.com panel at the bottom of our website.
- Find your country.
- Download the flag for it. They will ask you to confirm you'll attribute it to them. Just say "yes", as we do a blanket forum-wide attribution to them.
- Upload it to imageshack, or whatever image host you prefer
Some folks do a direct link by cobbling together a link to the downloadable flag from their site. I don't recommend this, as they specifically ask people not to do this.