Is there any way to add AirPort to a Power Mac G3 model?

No Power Mac G3 models -- Platinum/Beige or "Blue & White" -- have internal support for an Apple AirPort card (802.11b). However, "Blue & White" Power Mac G3 models can be configured with 802.11b or 802.11g wireless networking by installing a compatible PCI card.

Site sponsor Operator Headgap Systems sells an 802.11b/g PCI card compatible with a "Blue & White" Power Mac G3 running MacOS X 10.3 and higher for less than US$25 including shipping within the continental US. Site sponsor Other World Computing also sells a variety of inexpensive options.

Older Platinum/Beige Power Mac G3 models can be connected to a wireless network via a wireless ethernet bridge.

Please double check to ensure a particular wireless solution of interest is compatible with both your Mac and your operating system.

Can you add Bluetooth to a Power Mac G3 model without internal support?

No Power Mac G3 models -- Platinum/Beige or "Blue & White" -- have internal support for Bluetooth. However, one can add Bluetooth functionality to the "Blue & White" models with a USB dongle.

A number of Bluetooth dongles are available, but site sponsor Operator Headgap Systems sells one using the Broadcom chipset that works with MacOS X 10.2.8 or higher for less than US$20 including shipping. Site sponsor Other World Computing also has a variety of options. Please double check to ensure a particular Bluetooth dongle of interest is compatible with both your Mac and your operating system.

What type of Ethernet is standard in the Power Mac G3 models? Are Gigabit Ethernet upgrade options available?

The Platinum/Beige Power Mac G3 models have onboard 10Base-T Ethernet. Some configurations shipped standard with a 10/100Base-T Ethernet card in a PCI slot and all models could be custom configured as such. The "Blue & White" Power Mac G3 models shipped with 10/100Base-T Ethernet. All models can be upgraded to Gigabit (10/100/100Base-T) Ethernet with a compatible PCI card.

Site sponsor Operator Headgap Systems offers a Gigabit Ethernet card that works in both MacOS 9 and MacOS X and is available for less than US$25 including shipping in the domestic US.