That decklist looks pretty standard. I wrote a primer on the deck a while back, it's now located here:
http://www.themanadrain.com/index.php?topic=37138.0. Nothing much has changed since then. You have Pyretic Rituals where I would have Street Wraiths. I think the Wraiths make a difference in the long run, as a 56-card deck versus a 60-card one, but that would be hard to prove.
If you're looking for a more significant departure from the Legacy list, here's a more recent version I played and a tournament report:
http://www.themanadrain.com/index.php?topic=38716.
RUGBurn 4-Color, 0-Land Belcher4x Goblin Charbelcher
1x Timetwister
1x Windfall
1x Wheel of Fortune
1x Memory Jar
1x Necropotence
1x Tinker
1x Demonic Tutor
1x Demonic Consultation
4x Street Wraith
4x Elvish Spirit Guide
4x Simian Spirit Guide
3x Tinder Wall
4x Goblin Welder
1x Wild Cantor
4x Manamorphose
4x Rite of Flame
4x Dark Ritual
4x Chrome Mox
1x Mox Emerald
1x Mox Jet
1x Mox Pearl
1x Mox Ruby
1x Mox Sapphire
1x Black Lotus
1x Lion’s Eye Diamond
1x Lotus Petal
1x Sol Ring
1x Mana Crypt
1x Mana Vault
1x Channel
Sideboard
4x Empty the Warrens
3x Pyroblast
3x Tormod’s Crypt
2x Cabal Ritual
1x Inkwell Leviathan
1x Gaea’s Blessing
1x Vampiric Tutor
This is slightly faster, more broken, but overall less stable. It's hard to recommend one version over the other in a particular metagame because they're very similar. In either case, your goal is to ignore what your opponent is playing and win the game, so whether you do that with Goblin tokens or Tutors is more likely a matter of preference. I would probably play the RUGBurn version (with Tutors) in a more Workshop-heavy metagame, and an RGu version like yours against blue decks and Jaces.
The sideboard in both cases is sort of a crapshoot. Let me think if I can come up with something reasonable to suggest. Usually I sideboard very little, so beyond a few cards it doesn't matter what's in there.