OK, its early days for digital for me. I've had a Canon 400D for a while now, and have been experimenting with a Canon 24mm f1.4. This lens has a reasonable focusing scale and I find the infinity setting easy to select even though there is no definite "click" at the right point. I end up squinting down the lens barrel till I line up the lens index line with the infinity symbol. The results have been surprisingly sharp, even at full aperture.
My next purchase will be a short tele (probably an 85mm f1.8). It will be interesting to see if this lens is as easy to focus.