I'm writing this on Google Docs. I'd used ZoHo writer before when we had to to a group paper for a class. Group papers are logistic nightmares! And I'd used Zoho's presentation for another group project. I wasn't too impressed with it, though that was a couple years ago and I'm sure things have changed. Our problem was that we wanted to make nice handouts with the slides, like you can with PowerPoint, but we had to print the slided individually instead. Hopefully they've changed it.
Anyway, here I am with Google Docs. The presentation application seems pretty easy and you can choose different backgrounds, which is nice. You can also print, but again only 2 fit on a page rather than 6 or 9. The spreadsheet seems to have everything that I would need in a spreadsheet. I'm not an advanced excel user, so I'm happy with an easier version. As far as this writing program goes, I like that it saves automatically every so often. On the other hand, it doesn't seem to have spellchekk that works well/often. That could get me into trubble.