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I'm working with a VERY large site that has recently been redesigned/recategorized. They kept only about 20% of the URLs from the legacy site, the URLs that had revenue tied to them, and these URLs use underscores. Whereas the new URLs created for the site use hyphens.

I don't think that this would be an issue for Google, as long as the pages are of quality, but I wanted to get everyone's opinion on this. Will it hurt me to have two different sets of URLs, those with using hyphens and those using underscores?

If I have a page that has an area on the page that acts like a widget and has three different tabs. These tabs provide 3 different types of information relevant to the page subject matter. By default when someone goes to the page one of the tabs is showing but you have to click on the others to see the info on them.

Is it OK to use domain.com/topic#TAB1, domain.com/topic#TAB2, domain.com/topic#TAB3 to create shortcut links so that people can land on the page and have that predetermined tab showing.

I'm wondering what search engines might think. Essentially all the content of all three tabs is there for people to see but they'd have to click to see the other tabs. I don't consider the content to be hidden. But I'd like to hear people's thoughts.

I know that people have developed inhouse tools with the OSE API that can analyze thousands of URLs and pull metrics like PA, inbound links, etc. I need to analyze about 80k URLs and sort them by authority and I was hoping that someone could point me to a tool that can do this or let me use their tool. I'm willing to pay for access to it.

We could build it inhouse, I imagine that it would be pretty easy, but our IT resources are stretched too thin right now.