Seen a few posts that people are looking for firmware links, you can just check d-links directory. There was one released on 06/21/2010 200NA I believe. I hope I have the correct model.
ftp://ftp.dlink.com/Gateway/dir685/Firmware/
Here's the info for both firmware's so far...
DIR-685 Firmware Release Notes
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Firmware: 2.00NA
Date: 06/21/10
1.Added: DLNA render, controller.
2.Added: Samba workgroup.
3.Supports MS frameit service.
4.Added: Frame channel athenticaion key.
======================================
Firmware: 1.01NA
Date: 08/20/09
1. Changed: Graphic authentication disable by default.
2. Fixed: Auto refresh issue.
3. Fixed: Frame channel smoothen picture display.
4. Changed: Clock format from 24 to 12 am/pm.
5. Added: Refresh button on log page.
6. Added: DDNS connection status.
7. Added: "1000Mbps" option for "wan port speed".
8. Fixed: PPPoE disconnect issue.
9. Fixed: WPS issue.
Hope this helps.