I just fixed my Black with version 3, haven't tried that much so far...
I'm not sure if I downloaded the most latest version but the title logo was in English, though not the same logo as this:
http://img826.imageshack.us/img826/5787/pkmnblacklogo2.png
The xDelta where you select patch and ROM didn't work, nothing happened when I pressed "patch".
I then tried another version but it didn't work either (this one - thejbnet.com/progs/xgui/?p=download).
I also tried updating my Net Framework, though I already have 4.0, the update failed for some reason, I use XP.
The last thing I tried was patching using the "> This is a simple way to patch your ROM that doesn't require xDelta GUI, download it Here! " in the "Beta v3 Download", it worked.
I'm just curious if it's the same as Black-NewStyle-English-ExpPatched.zip?
Anyway, the version I have is a really awesome translation so far but there are still some stuff that would be nice if they got translated:
* When you select a pkmn in Pokemon (duh) you will get a list; Summary, eventual HMs, Switch, Item and Cancel - this stuff (except HMs are still in japanese)
* A whole bunch of stuff in the summary of a pkmn.
* The PC
With those things translated (and maybe some more?) it would be pretty much perfect until the US-release.