Thanks, everyone, for the feedback! I took DeafNala's advice re: the white dots and also did a dark rim around the eyes as per Christian's suggestion. You can see the finished froggies on my blog.
Here are some pics after I did the eye touch-ups:
http://painting-princess.blogspot.com.au/2013/03/an-eye-for-eye.html
And here are some jungle shots!
http://painting-princess.blogspot.com.au/2013/03/jungle-to-jungle.html
I also posted these same pics on the Battle of Frogonia blog (we originally started it to post progress pics and battle reports -- they will exist in the not-so-distant future, I promise!). I was just having a quick browse and saw the original progress pics for these little guys. I must say I am very happy with the results, if I do say so myself

-- it is so good to see the raw metal figs and compare them to the finished ones! So happy to have
finally finished a unit of something! (Well, two, if you split them into pike-frogs and hammerers.)
Here is the link to the BoF blog:
http://battle-of-frogonia.blogspot.com.au/Hope you like them!