simple...
Grab the keyboard from behind the bed.
Ctrl-alt-F1
login
ssh to the server
man crontab
crontab -e
edit the times (different for the weekend

)
save+quit
logout
logout
ctrl-alt-F7
Job's a goodun.
Have to say, we tend to get up at the same time everyday. Can't think why...
I also use the loud "Wake the F*** UP" alarm clock for those odd 5am drives...
I think the Nokia is more powerful - the Chumby is cuter. And it's designed to be hacked - I appreciate that. And it's a lot cheaper - the Nokia is circa $600+ (retail in the UK) vs $180. Not really the same ballpark...
If it had a battery built in - even with docking - then I'd try hard to get someone to buy/ship one for me.