Nope. All Parallax BASIC Stamp's have a BASIC Interpreter preprogrammed and they can only execute BASIC.
If you're interested in Assembler you should check out Parallax's SX processors. You'll need to buy a programmer such as the SX-Key or the upcoming SX Blitz to program an SX processor.
If you want to be truely accurate, you can hack a basic stamp to be programmed in ASM. But you'll never be able to program it in PBASIC again (because it involves overwriting the PBASIC interpretor). So you're best advised to pickup an SX development kit, with SX/B you can transition from PBASIC to ASM at a pace you are comfortable with.
Comments
If you're interested in Assembler you should check out Parallax's SX processors. You'll need to buy a programmer such as the SX-Key or the upcoming SX Blitz to program an SX processor.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
·1+1=10