All it does is take up space on your side table, right? I bring you iPing, who will provide 30 wake-up calls a month for a mere US $5. They’re also apparently ‘the first Internet service to creatively combine the power of the Internet with the convenience of the Telephone’. Since when did we start capitalizing telephone?
“I’m a busy man. I can’t manage to set my alarm every night. What if I’m high on peyote or having an orgy or something? If only I had a less convenient means of waking myself up in the morning!”
They’ve been around since 1998, and claim to have served 1 million subscribers (‘over the past 5 years’–they need help with their grammar and their math) so they must be doing something right.
DarrenBarefoot.com 
I have been using this software called “Say the Time” for some time. I am quite happy with it. It has lots of neat features. Check it out.
I was going to question the claim that they were first, since about four years ago I came across something called Mister Wakeup. But here it is, one of the tabs at the top of iPing.com.
We had great fun with its free version (you could pay to get a call with the weather, news, or other useful information), signing up unsuspecting coworkers for a call, then crowding outside their cubicle to hear their response.