[whpalmer4]

The sooner you buy it, the more use you'll get out of it before 2.0 :-)

I'm not quite as pessimistic (realistic?) as CatOne, but I think you'll probably get 6 months of use out of the current version before there's even a beta of 2.0, and 9 months until it ships if everything goes their way. If you can't get $5/month value from using OmniFocus, why buy it?

As a practical matter, the 30 day guarantee gives you a free pass to 2.0 if they upgrade that close to your purchase, and Omni has historically given a very generous credit for owning a previous version when upgrading. The trickier question, I think, is whether to buy from Omni directly or from the App Store. It doesn't effect the price you pay now, and it doesn't affect the guarantee, but you may not be able to get a discount on an upgrade if you buy the App Store version, and there are some other considerations which I think make buying directly from Omni the way to go. There have been some threads on the forum on this topic if you want to look for them.