The client weighs in at 1.64GB and will take a while to download, so have a crossword handy. See you out there!
Update: Blizzard has revealed the minimum system requirements for the beta. Check 'em out past the break.
PC Minimum Requirements:
- Windows XP SP3/Vista SP1/Windows 7
- 2.2 Ghz Pentium IV or equivalent AMD Athlon processor
- 1 GB system RAM/1.5 GB for Vista and Windows 7
- 128 MB NVidia GeForce 6600 GT/ATI Radeon 9800 PRO video card
- 1024x768 minimum display resolution
- 4 GB free hard space (Beta)
- Broadband connection