Mr_Smartepants

HP N40L Microserver and USB3 card $265 after MIR (NewEgg)
Here are the affiliate links if you need them:
Newegg.com

http://www.newegg.co...mbo1192698-LM3A
Combo is $329.99 before $65 (combined) mail-in-rebates.
HP ProLiant N40L Ultra Micro Tower Server System AMD Turion II Neo N40L 1.5GHz 2-Core 2GB (1 x 2GB) 1 x 250GB LFF SATA 658553-001
HighPoint RocketU 1022A PCI-Express 2.0 x1 Low Profile USB 3.0 Controller Card

Prices good for the next 25 hours.  Expires 11:59PM PST, 1/16/2013.

I've seen something similar.  You might need to make a registry change before connecting the card.
Follow the instructions in this KB article to make sure your registry settings are correct for RAID.
http://support.microsoft.com/kb/922976

• Exit all Windows-based programs.
• Click Start, type regedit in the Start Search box, and then press ENTER.
• If you receive the User Account Control dialog box, click Continue.
• Locate and then click one of the following registry subkeys:
  
  HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
  
  HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV
• In the right pane, right-click Start in the Name column, and then click Modify.
• In the Value data box, type 0, and then click OK.
• On the File menu, click Exit to close Registry Editor.

http://www.tigerdire...1904&CatId=4357
model no. ST1500DL003, for $99.97 initially but there's a $30 rebate  on the page with $3 s/h.
Limited to one rebate per person.

http://www.bhphotovi...rk_Storage.html

B&H Photo Video offers theDrobo FS 5-Bay Gigabit Ethernet Network Storage Enclosure, model no. DRDS2A21, for $459 with free shipping.
This enclosure can hold up to five Serial ATA hard drives for up to 16TB total. Deal ends March 24.

Product Highlights

• 5x SATA HDD Bays
• Gigabit Ethernet Network Connectivity
• Hot-Swappable BeyondRAID Storage
• Supports Drives up to 4TB in Size
• Drobo Dashboard 2.0 via Update
• Drobo PC Backup via Download

Just so everyone knows, this model has ONLY a network port on the back.  No USB or eSATA.
Still, it's $130 cheaper than at the drobo store ($699).