(I'm not trying to advertise, but I found it to be very interesting, and decided to post it.)
Hey, fellow SSB players! I've recently noticed a fan-mod for Brawl entitled Project M. This mod changes the physics of the game, making it play more like Melee, while keeping Brawl's extras in. Currently, the mod is in it's beta 2.5b state, with only 6 more characters left to add. It has custom stages, most being remakes of older stages, like Fourside, while others being entirely new stages, like Skyward Sword's Skyloft. It also includes some character mods, some being simple, like changing one of Marth's palettes, while others are more complex, like entirely changing Lucas's Neutral Special.
...Yes, wavedashing is included, in case you were wondering.
The mod can be seen here: http://projectm.dantarion.com/
For more detail on it, see here: http://www.ssbwiki.com/Project_M