How to invoke the search key shortcut?

[raddy]

Hello Everybody

I use Voice Speed Dial up extensively.
I find it very convenient to invoke the application in Google Nexus S using search key.
How to do the same in newer generation mobile phone which has just 3 keys?

 

[Jubakuba]

Kinda' obnoxious that they removed search, in my opinion.
Most (all?) of the custom roms allow you to add new things to the nav bar.

But if you're on JellyBean...just swiping up from the nav bar opens GNow. Search bar included.