The speculists blog is becoming a daily read. Two nibblets cribbed from them:
Celestia: A sort of google universe.
Starship Dimensions: Helps you to visualize the odd cardassian battlewagon versus an alliance cruiser. Or some such.
Heads in the clouds day. And don't forget to check out this gem:
Goose is going well. Easier to cook than I thought. The recipe calls for a higher temperature than I'm used to using on poultry, but the bird smells good. One hour to go.