Documents To Go Premium for the iPhone and iPod touch has been updated with Google Docs support.
DocsToGo Premium lets you: EDIT, CREATE & VIEW Word, Excel & PowerPoint files (including Office 2007/2008) View PDF, iWork & other files Send & receive attachments in MS Exchange and Gmail - no need to forward your email to an untrusted mail server Access, use & sync files stored in Google Docs Includes desktop app (Win & Mac) with 2-way file sync (Wi-Fi required)
What's New In Version 3.1: - Google Docs support - Multiple email accounts - Freeze rows or columns - View RTF (Rich Text Format) & TIFF attachments - Rotate PDF files
You can purchase Documents To Go Premium from the App Store for $14.99.
Incredible, their standard version does not support even powerpoint files, they literally forgot about that version. Too sad, they should have gotten just the premium out and prevent all this.