Is there anyplace where I can get principal parts easily online? The best I have come up with is Bailly. LSJ requires you read the whole entry and weed out non-Attic forms.
http://home.scarlet.be/tabularium/bailly/index.html
You can also check Smyth’s List of Verbs.
The pdf copy is better for that purpose.
pdfs aren’t really convenient. I want something in HTML. Of course the link I provided now was ultimately to a pdf so I’m a bit of a hypocrite. But it is only one page at a time and so is much faster. That would be a good project for us. And maybe it would increase traffic. Have an Attic principal parts list. Just one monster HTML list. Could do the same thing for epic and Koine? Maybe I’ll start my own Attic site and put that list in the center ring!! Hmm. Tempted.
I would help with the creation of such a list. 
Kaegi’s Greek Grammar has a nice list of irregular verbs with their principle parts.
Not html, though.
Smyth has been digitalized, including the appendix with verb list (check here)
There is this, but it’s Greek to German.
Thanks Lex! Perfect. And although I haven’t learned German yet, there is an easy work around for that site. You just use Lingoes which gives you awesome mouse over definitions. Somebody really needs to set up Lingoes for LSJ especially with all the forms in Perseus. No reason one cannot just mouse over Greek and get something even better than Perseus, namely the form, e.g. 2. pl. subj. etc, and the whole definition from LSJ or Middell Liddell. All the hard work has already been done. Perseus was set up in the early days of the internet. We are beyond that now with mouse over boxes. It is a lot faster. Like dial up to cable. I use it every day for other languages and I get a reading speed close to English.