Im actually interested in a new leak for two reasons, one, Id like to see just how quickly Samsung is developing. Based on the number of issues that the initial ICS leak had and a newer build might give some sort of indication of not only how fast they are developing but also how soon we might see something official. Two, Id like to see what Samsung considers the most important issues to fix based on what was previously leaked,
Im not rooted or rom'd and have no intention of doing so right now. When we start seeing some REAL customized roms not based on the stock rom but rather based on open source code that Samsung will hopefully release soon, Ill consider rom'ing.
But right now, the ICS roms have too many issues (ironically, the same exact issues the leaked rom has, just some of them have managed to 'patch' or 'hide' those issues with clever workarounds), not enough customization options and other than some colour changes, appear to be basically the same as the stock rom with the added ability to overclock. Not enough for me yet to switch to anything.
But the sooner Samsung releases an official ICS, the sooner they will be required to release some source code, which means the real development will start happening.