Hi,
Guess I'll pop my forum cherry on a non-language related topic. I'm not really a photog as much as someone who had a passing interest in the technical aspects of the hobby before (though I did take some pictures in the past). As such, while I can't really share any flickers I hope I can offer some tips on technicalities. The 50mm is a bit of a pet peeve of mine actually, which is in fact why I'm posting.
Grats on your new camera, I think Canon's x0D series are some of the best cameras in regards to the inevitable compromise between size/weight and usability. A fast prime is always a good idea, but I think you ought to reconsider the 50mm. 50mm lenses used to be recommended because they are fast, cheap, and most importantly because they offer a similar field of view as you would see with your own eyes. Your 20D has a smaller sensor than the 35mm cameras of olden times (lawd, I can't write that word without envisioning the kanji.), and as such the part of the image circle that covers the sensor will be smaller. As a consequence, what you will see on your pictures and in your viewfinder is only a smaller area in the middle of the image circle cast by the lens. In turn this will make it seem like you are "zoomed in", if you will excuse the term. The perspective will be flattened, and your field of view will be narrower. For portraiture this is ok, but for a standard, walkaround lens it's somewhat problematic. It's simply not that useful for most people, as it's not wide enough. You could be the exception of course, but it's a good idea to experiment with your kit lens and see what focal lengths you use the most. Another argument against the 50mm on < 35mm cameras is that the increase in focal length make them harder to hand hold at slow shutter speed. Many people (I'm not sure you're one of them) buy fast primes to be able to shoot at lower lighting conditions than what zoom lenses would allow them. However, at an equivalent field of view of 80mm (50mm * 1.6) on traditional cameras, you're essentially wielding a short telephoto lens. Longer focal length means that small movements on your part translate to big movements in the image, which in turn makes it easier for pictures to become blurry unless you use a fast shutter speed. I'd recommend against buying a new lens without first checking what type photography you enjoy. While the kit lens isn't awesome, it is small, light and adequate. If you decide to get a traditional 50mm equivalent, I'd suggest looking into Canon's 28/2.8 or 35/2.0 (I'd guess. I've never used Canon gear myself), or particularly Sigma's 30/1.4, which I believe offers a great bang for the buck. Just make sure you get a copy without backfocus (in which case you do, you'd have to send it to Sigma for calibration.).
As for reading, I recommend doing it as little as possible. Get a grasp on a few basic compositional techniques (eg. rule of thirds, leading lines, framing, etc.) and use them actively when you feel they add to your pictures. Photography is a practical art, so you're far better off taking pictures and trying to get constructive feedback from a good, serious website (ie. neither flickr or /p/), than to read a whole lot without putting it into practice. If you really want some reading material, many people seem to like "Perception and Imaging", but any general book on composition should work. The following article is good, and should be enough:
http://www.luminous-landscape.com/column...on-2.shtml The articles on this website tends to hold very high quality standards, so it might be worth browsing -- especially if you feel you'll like landscape photography. Probably my favorite photography website on the web.
I read far too much when I started on this hobby some years ago, and it killed it for me. If you find you're reading more than 10% of you your shooting (at least in the beginning), you need to get out more.
*Enjoy* your new hobby. Don't read about it. Having fun, is much more important, and you'll improve more by doing than by reading. Biggest tip: Don't obsess over gear. What you have now is more than enough to take excellent photographs.
Hope that help, and enjoy.
PS: I might be getting some technical terms wrong, as it's a long time since I've been into this stuff. Feel free to correct me.