I created a compact dark solarized theme to match my iTerm colors, so I thought I'd share it in case someone else was looking for the exact same thing!
VVV Dark Solarized (Compact)
Alfred Themes are imported via a URI scheme. So, when you click on the + Import Theme link, the Alfred2 Preferences window will open, asking you if you want to import the theme. There are no files to download, and, also, because of that, themes cannot be auto-updated.