AT&T No-contract 30-day 3G Service for iPad Auto-renews

Gizmodo noticed the AT&T 3G Data Plans for Apple iPad PDF document and summarized it for us:

The Final Details on the iPad’s 3G Data Plans

The two important items to note are:

1. The no-contract 30-day plan renews automatically every 30 days. The 30-day clock is based on both day and time. So, you need to note exactly when you turned on a plan and be sure to turn it off before the next 30 day cycle begins

2. The plan includes unlimited access to AT&T WiFi hotspots. Since AT&T service Starbucks and other national chains, this adds up to over 20,000 sites