DONT DO IT. WARNING DANGER!!!!!
FCP is far more stable currently, and switching in my opinion would be a step backwards.
We currently have 5 FCP Suites here and one PPRO suite, all of us dread using the PPRO suite due to its serious software faults which tend to hamper workflow and generally agitate the user.
But to answer your questions if your still switching.
1. Is there a huge learning curve from FCP to premier?
No, both NLE’s are fairly similar in operation, some little things are different but the basic workflow doesnt differ too much.
2. Will it export FLV right from Premiere?
No, as of CS4 all export functions are tied in to adobe media encoder, which will export FLV, but is currently a horrible buggy piece of software which has killed my deadlines more than once.
3. How much power would I need to be able to render and still edit on the same machine from apple and yes G5 tower.
PPro generally doesnt need rendering on native clips in timelines to playback in realtime, assuming your hard drives are up to scratch and your running some soft of hardware acceleration like BMD cards.
You still need to render effects and altered clips.
On some of the more powerful Macs these days in FCP you barely need to render anything.
Thank you again for all your help and advice
Chuck Obie
~Peter Berthet
Sydney, Australia