Finally the date is set for the access of Wolfram alpha to everyone. Yes, its been officially mentioned on the blog that "We plan to launch late next week, with the official date now set for May 18.".
When it is opened access and set for testing for a short time, within minutes many people discovering that and started exploring it. You can see the traffic graph below.
Seems like everyone is keen on trying on this new computational search engine which has gained lot of buzz on the web as this is expected as a rival to google. Now even i'm looking forward for May 18 to try and experiment some of my queries :).