GsiteCrawler every time. It's free and It's an awesome awesome tool http://gsitecrawler.com/

Sorry for butting in on an old(ish) post, but I have a different opinion on this...

Correct the text used in the example does show up in the source code as HTML, but I dont think that indicates that google is reading that text.

For me there are two ways to check to see if Google is reading text:

1. Do an exact match (quotation marked) search in google.

2. Look at the cached version of the page in google in text only version.

From that information, the lightbox data is not showing up and for me that would indicate that the text is not being read.

Also, an interesting point to note is that 'Fetch as Googlebot' should not be used as a method of identifying what text is being parsed according to searchengineland http://searchengineland.com/see-what-googlebot-sees-on-your-site-27623

Feel free to prove me wrong!

thanks

james