As far as shammy gear goes, the blue PvP set is a fabulous set that you can get very cheaply from vendors that is better for PvE (and of course PvP) than almost anything you can get from quests or regular instance runs. Even the heroic shammy DPS set (mostly from Heroic Coilfang) is only slightly better than the blue PvP set.

As far as a weapon goes, grinding for S1 weapons is a possibility, but another is to get attuned for Heroic MgT and farming the 1st boss there - he drops a fantastic +185 spell damage epic dagger for ele shammies - will be a huge upgrade to anything else you'd get. Until then, get revered with SSO for the +130 spell damage mace. Before that, buy Bringers of Death off the AH (+121 spell damage, but no shield). That's what I did.

BTW, anything you can do to avoid relying on drops is better than not. I've killed the first boss in Heroic MgT 16 times now and still haven't had 3 daggers drop (25% drop rate on it). Your luck will certainly be better, but just a warning