Here's the relevant pages from Steve's passport. Most of the stamps are pretty difficult to make out especially the numerous Argentinean ones - they seem to pride themselves on smudging the stamp as much as possible.
Passport Pages (approx 40k each)...
Page 1 Hong Kong, Thailand and Laos entry stamp
Page 2 Australia and check out that Mongolian visa and entry stamp
Page 3 New Zealand visa and Laos visa
Page 4 Argentina plus a very rare Marshal Islands (Bikini Atol) visa
Page 5 Aus, Chinese entry stamp plus Chinese visa (cancelled as we renewed it)
Page 6 Replacement Chinese visa
Page 7 Brasilian stamp and Mongolian visa
Page 8 Argentinean and Chilean stamps
Page 9 More Chilean and Argentinean stamps
Before we go travelling again, we'll need to get replacement passports. Countries that issue visas in advance quite often require you to have some empty pages in your passport. You try persuading some Chinese immigration official not to stamp on a new page! Oddly, all Megan's stamps ended up neatly arranged in rows with entry and exit stamps next to each other. Steve's looks like a demented stamp-fest.