[citation][nom]Dangi[/nom]USB 2.0 and only 2 ports.But as said before SD is a MUST to run Rasperry Pi, try class 10 SD cards if you feel that the boot is slow. That shouldn't be more much slower than USB 2.0[/citation]
I actually read somewhere that the Raspberry Pi was having problems with class 10 cards. These issues may have been ironed out by now, but it's worth checking into before buying a card. If they have been fixed, then by all means, yes, buy a class 10 SD card.