no , built in space is not an issue for me at the start, i'll buy a game or 2 and that will keep me busy , maybe when loads of games are out and CFW is available i will worry about space!
I will trying out any hacks if they become available, for me that is almost as much fun as using the device normally! And im sure some third party storage will become available sometime - eg: maybe microSd/M2 or other adapters or maybe some new way. not sure if i will get the 3g version though, will have to see how my funds are looking!
Anyone tried any ps3 games or blurays in 3d yet? (is it any good or a load of hype, I didn't think much of the 3D cinema movies and now I just go to the 2d versions instead)