I have tried all the Yahoo Go!'s over time, starting back with the 1.0 S60 (Symbian/Nokias) versions and up through the 2.0 betas on BlackBerry -- I was never impressed with this app, it was always dog slow and never of much use on any phone, really. But last night I decided to install the latest release 2.0 for kicks just to check out the progress.
I am pleasantly surprised at the progress and will keep it installed.
The 2.0 release (2.0.38-23 on a Pearl 8100, OS 126.96.36.199) is actually quite usable and fast, the lag from previous versions is gone. It does take ~11 to ~13 seconds to start up which isn't too cool, but once it's launched and running the UI is quite snappy now - a definite improvement from past releases, even the beta 2.0's. I am no longer mentally saying to myself "man is this thing a dog" now.
One thing that makes this app worth the time -- the Flickr interface. This has got to be the best mobile interface to a web service I've seen yet, if you're a heavy Flickr user (like myself) you should really check this bad boy out. Your mobile Flickr experience will be a very nice one, and free to boot! (I'm a Flickr 'Pro' - paid - user if that matters)
So if you're like me and have dismissed Yahoo Go! out of hand based on past experience of it being crappy, you might take 15 minutes and try the latest release - you might be turned around like I've been.
in your BB browser