Crucial has announced on their website that they are making 32 GB and 64 GB Solid State Drives (SSD). This could be a hint towards the rumored "Slim-MacBook" that may be coming in MWSF. They have not released the drives yet, so if there will be a Slim-MacBook, it may not be released to buy immediately at MWSF.
http://www.crucial.com/promo/index.aspx?prog=ssd
http://www.macworld.com/article/131368/2008/01/ssd.html
http://www.crucial.com/promo/index.aspx?prog=ssd
http://www.macworld.com/article/131368/2008/01/ssd.html