Here is an update on the Progress of the much awaited Community port of WhatsApp and here is where the Project currently stands:
And adding to the done list too:
There is also a new website that will be populate in due course with information but for now answers some basic Q&As http://wazapp.im/ The Developer tgalal will appreciate any advise "concerning running the app in background".
No news of a Beta release at the moment ...
Source Talk Maemo