Supposedly this is for any car. For 169$ I'm thinking of pulling the trigger after a bit more research.

http://www.advancedkeys.com/Prod_IUI102.html

this site too where they are adding keyless remote push button start too:
http://www.nitroforumz.com/showthread.php?t=29913

Advanced Proximity Keyless Entry
IUI-102
http://www.advancedkeys.com/images/Product_Thumb1.jpg (http://www.advancedkeys.com/images/Dimension.jpg)
http://www.advancedkeys.com/images/Product_Thumb2.jpg (http://www.advancedkeys.com/images/Components.jpg)




$169.99



Feature Overview:
- Hands-free lock/arm and unlock/disarm
- Automatic windows roll-up
- Dual-frequency security
- Vehicle anti-theft system
- Bright dual color LED status indicator
- Flasher and horn status confirmation
- Starter disable relay
http://www.advancedkeys.com/images/Tech_title9.gif

CONVENIENCE FEATURES
Advanced Keys IUI-102 is a hands free, keyless access system for improved vehicle entry convenience and security. This hands-free keyless entry system allows you to automatically unlock and lock the vehicle doors without ever pushing remotebuttons or taking your key out of your bag or pocket. This package also includes a window and sunroof roll-up module that will automatically close any open window when you leaving vehicle. Built with latest secure RFID technology and combined with rolling-code encryption, this dual-frequency remote access will provide the best possible vehicle keyless access convenience, security and more.

SECURITY FEATURES
To prevent vehicle theft, optional anti-theft features will monitors door switches and ignition when armed. If access key is not present when doors/engine are activated, it will trigger alarm and disable ignition starter circuit. Starter disable can provide the extra layer of security and is an effective fail-safe protection against vehicle theft.

FEATURES
Hands-Free, automatic door lock / unlock 2-3 meters range
Compact access key fob
Automatic windows roll-up and sunroof closing
RFID mutual authentication and encrypted rolling code security
Automatic Arming / Disarming
Parking light, Horn/Siren output
Low power consumption
Vehicle status due-color LED indication
Starter disable relay (Can be used for push-start button enable control) http://www.advancedkeys.com/images/Tech_title10.gif

http://www.advancedkeys.com/images/IUI/IUI_Remote.jpg 2x RFID Remote

http://www.advancedkeys.com/images/IUI/IUI_Control.jpg 1x Controller Unit

http://www.advancedkeys.com/images/IUI/IUI_Antenna.jpg 1x Radial RF Antenna

http://www.advancedkeys.com/images/IUI/IUI_AutoWindow.jpg 1x Windows Controller

http://www.advancedkeys.com/images/IUI/IUI_Relay.jpg 1x Relay with Socket

http://www.advancedkeys.com/images/IUI/IUI_LED.jpg 1x Dual Color LED

http://www.advancedkeys.com/images/IUI/IUI_Wires2.jpg Fused Wire Set


http://www.advancedkeys.com/images/Tech_title12.gif

http://www.advancedkeys.com/images/dia_default.png Single-Line Controller Wiring Diagram
http://www.advancedkeys.com/images/RFID_Range3.jpg Component Location Diagram
*Note: Antenna location may vary depending on preference




http://www.advancedkeys.com/images/Tech_title11.gif

Here's another for you to evaluate also:

http://www.auto-hub.com/stardrive_push_start_ignition.html

Now that is a cool system. I figured sooner or later this feature would be in the aftermarket. Just dont loose the key fob. :p