Vanilla Chrome keyboard shortcuts (For OS X) [1]:

  Command-W: Close tab
  Command-Shift-W: Close window
  Command-L: Focus omnibox
  Command-Enter (In omnibox): Open in new background tab
  Command-Shift-Enter (In omnibox): Open in new tab
  Delete or Command-[: Back
  Shift-Delete or Command-]: Forward
  Command-R: Reload
  Command-Shift-[ or Option-Command-Left: Previous tab
  Command-Shift-] or Option-Command-Right: Next tab
  Space: Scroll down
  Shift-Space: Scroll up
  Command-Down: Go to bottom
  Command-Up: Go to top
  

Selecting and activating links with the keyboard:

  Command-F: Show and focus find bar
  Enter or Command-G: Find next
  Shift-Enter or Command-Shift-G: Find previous
  Control-Enter: Activate highlighted link

This is limited, though; there is no way to open a link in a new tab, and find starts from the top of the page (bug?).

Personally, I find it more efficient and ergonomic to scroll and select links with my MBP's trackpad. Scrolling is especially fluid with two-finger smooth scrolling. Gestures and the changes to scrolling have allowed me to forgive a lot of weirdness about Lion and Mountain Lion.

[1]: http://support.google.com/chrome/bin/answer.py?hl=en&ans...