I don't know if it's true, but accordingly to some rumours on forums, seems that you can get 2GB of space free NOW by registering an @msn.com email address.
Personally, I'm sceptic about this rumours expecially because, accordingly to the original MSN Hotmail plans, 2 Gb of free storage will be reserved only under a little payment (Premium User). However, If someone can confirm this upgrade...
UPDATE: I see on your reply to this post that maybe you don't understand the sense of my message... I try to explain. Seems that this morning NEW Msn subscribers had an upgrade to their mailbox space from 250Mb to 2 Gb. I don't know if this is a bug or what, but this is the fact.