The router is a WRT54G and the firmware version is Version 2.00.8.
I found a new Firmware update and here is the following info...

Linksys, A division of Cisco Systems, Inc.

Product: WRT54G

Classification: Firmware Release History

Firmware Date: 8/18/2005

Release Date: 8/25/2005

Last Firmware Version: 4.20.7
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Firmware 4.20.7
- Resolved issue with SecureEasySetup button delay
- Resolved issue with SecureEasySetup overwritting current wireless settings
- Resolved issue with not being able to disable SecureEasySetup button
- Resolved issue with Diag light being constantly lit after upgrading to 4.20.6 on v.1 hardware
- Resolved issue with iDefense security vulnerability
- Resolved issue with L2TP disconnect
- Resolved issue with SecureEastsetup long button push not resetting wireless settings

Firmware 4.20.6
- Resolve issues with setup wizard
- Updated wireless security menu
- Resolve issues with port based QoS

Firmware 4.00.7
- Adds SecureEasySetup push button support
- Resolves large file transfer issues
- Resolves issue with enabling TKIP after enabling WEP
- Updated QoS features
- Resolves issues with multiple Access Restrictions policies
- Resolves issue where multicast breaks when MAC filter status changes

Firmware 3.03.6
- Supports hardware version 3
- Updated help file

Firmware 3.03.1
- Wi-Fi certified

Firmware 3.01.3
- Updated wireless driver
- Supports hardware version 2.2 (cannot downgrade to previous versions)
- Resolves issue with VoIP adapters
- Resolves issue with long domain names

Firmware 2.04.4
- Updated wireless driver
- Updated certificate generation for https access

Firmware 2.04.3
- Resolves issue with disabling firewall
- Added QoS function
- Added Port Triggering function
- Added L2TP option for WAN connection type
- Added ability to back up and restore configuration files
- Added Wireless isolation function
- Added ability to filter internal NAT redirection
- Added ability to restrict access to web GUI from wireless clients
- Added ability to filter IDENT port 113
- Resolves issue with HeartBeat WAN connection
- Added support for 40/56bit cipher to support old browsers to use https
- Resolves issue with PPTP passthrough
- Changed WPA Group Key renewal time range to 600~7200 seconds
- Added IGMP proxy support
- Added ability to allow web GUI access only through https or http


Firmware 2.02.2
- Updated wireless driver to support all versions of WRT54G hardware
- Adds support to allow WAP54G connect as a repeater
- CTS protection mode set to disable by default to improve wireless performance in normal environments
- Resolved issue where the WLAN LED stays on even when wireless is disabled
- Resolved security vulnerability causing the web server in the router to crash