for sure!
thats gonna start to be the standard the moment Vista is released....I just built a system for a friend and I put a Intel P4 3GHz and 1 GIG of RAM in it and it simply fliiiiiiiiessss
Right now, the standard is the 512MB of RAM but you can always upgrade, especially these days with memory being so cheap.
If you know how to build a system or know someone that can...go to newegg.com and pick out your parts...or I or the other IT gurus here and can help you pick em out. If not, then visit Dell.com and build a PC with the drop down options