I just got my RTC from futurlec, I haven't wired it up yet, but you're right about the size. It's much bigger than I imagined and making it yourself should actually save space. The printed board they use has a lot of wasted space.
I'm going to play with the clock and see about writing some code to turn a relay on and off based on time, but other than that, I'm just waiting for my controller for the lcd and keypad, and the actual keypad itself and I should have all my components.