For 1.2, the generic ball and the idea to change buu's the chocolate in buu's cookie attack made it in. Another decent idea I found is the releasing controlled attacks in a ps against projectiles, that might make it in later. Halorin had some influence on Joe in designing the advanced melee.
When reading the suggestions forums, I usually skip the threads with character suggestions, fusion ideas, crappy titles (teh best idea evah!!!!, something i came up with last night, esf team read this, etc) or non-existing interpunction (i love the pre-read function on the forums). This leaves 1 or 2 threads a day that I'll actually read and might find something usefull in.