Assuming that the 10 teams from 2008 + Wales + Cook Islands are automatic qualifiers, and assuming Italy, Lebanon, Russia, and Serbia are in the European qualifiers and Jamaica, Japan, South Africa, and USA are in the 'Atlantic' qualifiers, then...
... from the 2008 World Cup, we had 19 counties participate inclusive of the qualifiers. So if the rumours are correct we will have an increase by 1 and have 20 countries participate in 2013 inclusive of the qualifiers.
Gone from 2008 are: Georgia, Holland.
New for 2013 are: Italy, Jamaica, South Africa
Italy participated in the 2000 World Cup qualifiers but have never made it to the main tournament.
Jamaica will make their World Cup debut.
South Africa participated in the main tournament in 1995 and 2000, but 2013 is their first time in qualifiers.
Since World Cup qualifers started in 1999 for the 2000 World Cup, we have had the following numbers:
2000 - 20 countries (excluding NZ Maoris). 15 in main tournament + 5 that didn't progress past the qualifying stage. One nation qualified - Lebanon.
2008 - 19 countries. 10 in main tournament + 9 that didn't progress past the qualifying stage. 5 nations qualified - Fiji, Ireland, Samoa, Scotland, Tonga.
2014 - 20 countries. 12 automatics + 8 countries to fight it out for the remaining 2 spots.
Since 1954 thru to 2008, a total of 15 countries have participated in the main tournament (excluding NZ Maoris and Great Britain - the home nations are counted instead of Great Britain). Number of tournaments in brackets:
Australia (13)
Cook Islands (1)
England (4 + GB 9)
Fiji (3)
France (13)
Ireland (3)
Lebanon (1)
New Zealand (13)
Papua New Guinea (5)
Samoa (3)
Scotland (3)
South Africa (2)
Russia (1)
Tonga (3)
Wales (3)
A further 8 countires have participated in the 2000 and 2008 qualifiers and never progressed to the main tournament (+ Jamaica in 2013). Number of qualifying tournaments in brackets:
Canada (1)
Georgia (1)
Holland (1)
Italy (1)
Japan (2)
Morocco (1)
Serbia (1)
USA (2)