I found an external drive at one of those deal-a-day websites that might be of interest to WHS users.
Cavalry 1TB High Speed External Hard Drive USB 2.0 with Internal WD10EACS & One Touch Backup CAUM3701T0-B - NEW for $119.99
I know I have removed drives from enclosures and replaced with a smaller one so this might be a good opportunity for anyone looking for 1TB drives. The deal-a-day sites usually have overstock, refurbs, or products that didn't sell very well so I'm not sure what category this drive falls into. Site says it's new. It's a green drive so the RPM's are 5400 to 7200. Take a look for yourself.
I just ran across the Western Digital Green 1TB drive at Newegg.com for $129.99. Free Shipping, No Rebates, No Promo Codes needed. Follow the link to see it at Newegg.
Western Digital Caviar GP 1TB 3.5" SATA 3.0Gb/s Hard Drive
If you run across drive deals let me know!