It's not anything official, but enterprising Android developer bubby323 has ported CyanogenMod 7.2 to the Sprint Epic 4G Touch. Yes, 7.2 is Gingerbread and not the Ice Cream Sandwich everyone wants, but CM9 (the ICS-based build number) isn't quite ready for any unsupported devices. We'll manage with Gingerbread for a while longer.
Using device files from the TeamHacksung Github, bubby and friends have got a semi-complete ROM built and running, and while probably not ready for a daily driver, it's more than complete enough for anyone who wants to test an AOSP-like experience on this hardware. Notable missing functions include 911 calling (let's hope it isn't an issue similar to the Vibrant), Wimax data, SMS and MMS from the native messaging client, GPS and external SD card mounting. Early reports seem positive, and users certainly love the freedom from TouchWiz. The folks are hard at work fixing the bugs and getting all the features up and running, if you're rooted and up to helping test be sure to hit the source link and have a look.