As I've written elsewhere on this forum:
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I'm having an amazing time using OmniFocus only on my iPod Touch (I have a PC desktop). I have almost 2,500 actions, although I guess that includes completed items as well.
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I only use OmniFocus on my iPod touch. I do not have a Mac. I am currently over 2,000 actions/items. I have created an online tool that allows me to quickly enter in many items into OmniFocus at once (or rapid fire).
You need to be careful to escape special characters, such as ampersands and apostrophes, but it has saved me countless hours, and makes it possible to use OmniFocus ONLY on my Touch.
Give it a try:
http://www.jeffyepstein.com/docs/com...ort/index.html
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So anyway, I highly recommend OF for only your iPod Touch. Do not be afraid. Join us. :)