Well right now my set up is at almost $900 and all I have is a T3i with kit lens, 2 16gb mem cards, a camera handle, and cases.
To improve my set up I'm looking at all of this.
Fisheye: http://www.bhphotovideo.com/bnh/controller/home?is=REG&sku=769428&Q=&O=&A=detailsv
Rode Mic: http://www.amazon.com/gp/product/B0007U9SOC/ref=pd_lpo_k2_dp_sr_1?pf_rd_p=486539851&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=B004K8WPUQ&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1FBE2PA0H45890RR1FCP
More Batteries (Either The Legit Canons for $50: http://www.amazon.com/Canon-LP-E8-Battery-Digital-Cameras/dp/B00393THEK/ref=sr_1_cc_1?s=wireless&ie=UTF8&qid=1326044795&sr=1-1-catcorr , or the 3 market ones for $10 each: http://www.amazon.com/EOS-Rebel-Digital-Battery-Lithium-Ion/dp/B004NEJ7HQ)
And a new tripod: http://www.bhphotovideo.com/bnh/controller/home?O=productlist&SID=&sku=243272&AID=10655283&PID=3741077&is=REG&A=details&Q=#pr-header-243272
Ideas about all this gear would be AWESOME! Karma points boost as well