I'll make you a deal.
If you go and order a Cybiko here on the 12th or 13th and you use my code BG0543, I'll mail you $20 cash in addition to the 20% discount you'll get from Cybiko. That'll give you a Cybiko for $59.96+S&H (they're selling used on eBay for $60), and it'll give me enough stupid-bucks to get a couple of memory upgrades for half-price.
If you're going to go with this deal, lemme know beforehand. I'll drop the cash in the mail as soon as the website verifies your transaction for me.
If you're still skeptical, check out the websites dedicated to hacking the cybiko (1, 2, 3). This thing's proving to be the most open and hackable handheld ever made. The fact that they're giving away a C compiler and imposing no content restrictions helps too.
And many of the games are surprisingly good given that they're free. The current list is here.