Today, the sky was clear. Following the same methodology as yesterday, the camera was placed on a tree stump and the exposure set at 30 seconds, f2.8 and infinity focus with a 17mm lens.
Sadly I couldn't get a higher ISO than 1600. I had thought that my 30D would have been able to achieve 3200ISO but it appears I am mistaken as it resolutely stopped at 1600.
The key to great star photos is ultra high ISO from what I hear. Clearly these photos are about the best I can achieve. They're pretty good but not what I wanted to achieve. C'est la vie!