Last night I went into Osaka to do a final bit of coverage for the next Lonely Planet guide to Japan. Every time I go to Osaka in the evening, I realize what a cool and exciting city it is. If you go, I recommend a walk from Umeda Station to Kita-Shinchi, then hop of the subway and walk around Shinsaibashi, Amerika-Mura and Dotombori. It's great. Here's a picture of the signs along Dotombori:

Here's a picture of the famous Ebisu-Bashi Bridge in Minami: