I didnt even know the 500D is out but Hutec already are modding them for astro imaging
http://www.sciencecenter.net/hutech/canon.htm
EOS061 Canon Rebel T1i (500DH) spectrum enhanced camera with built-in clear filter wideband-multicoated and std Canon accessories $1,199.00
The ability to do HD movies will be fantastic for planetary imaging. It looks to be a fantastic camera
http://www.canon.com.au/eos/range/eo...resummary.aspx
Scott