Apple hasn't shipped Adobe Flash Player on Macs since last October, and the current shipping version of Flash Player has some incompatibilities with Lion that have yet to be fixed. If developer iSwifter has its way, you won't need Flash Player on any of your Apple devices.
iSwifter currently has a Flash-free browser app for the iPad that works in the same way as the Puffin and SkyFire browsers on that platform -- it runs all web content through a server that processes Flash content and then sends the "translated" animation, game, or movie to the device browser. Now iSwifter is planning on bringing its browser to the Mac App Store, although they're not saying exactly when the app will be available.
The company wants to give users a common Flash-compatible browser that looks and acts the same on all Apple platforms. The existing iPad app is available as a free trial, and then charges $4.99 as an in-app purchase to use the browser without limits. iSwifter is planning on using the same process for the Mac app, although pricing may be different.
So what would people use the iSwifter browser for? Mostly for playing Zynga games on Facebook. Over 40% of all gaming time logged on iSwifter's servers is for those games, which include Words With Friends, Farmville, Cityville, and Mafia Wars.