So what all should I be buying? I'm looking through the digi-key web site and trying to decipher the circuit diagram in the PDF. Unfortunatly, I really earned my C in electrical-engineering-for-cs-majors and I'm not really up to speed on this stuff yet.

So far, my digi-key shopping cart consists of the following
(ugly snarf&barf from table warning)
1 1 LM7805CT-ND IC REG 1A 0-125DEG C TO-220 IC2 0 0.48000 $0.48
2 1 399-1447-ND CAPACITOR TANT 2.2UF 50V 10% RAD C2 0 0.93000 $0.93
3 1 P2067-ND .1UFD @ 50VDC TANTALUM CAP C1 0 0.43000 $0.43
4 1 MAX233CPP-ND IC 2DVR/2RCVR RS232 5V 20-DIP IC1 0 7.45000 $7.45
5 1 PT5101N-ND REG 5V/1A 3P-SIP INT SWIT VERT IC2 - SECCOND CHOICE 0 14.62000 $14.62

Questions:
1) In the BG Micro PDF, what is B1? A generic pull down resistor? Or some other component I'm not recognizing?

2) Is a PT5101 worth the extra $14 to have a switching power supply instead of linear? It's recomened in the PDF for the motorola, but really adds to the expense of all this.

3) Can I actually get these at radio shack? They're not showing up when i search their catalog online... But I'd love to avoid shipping&handling.

Has anyone gotten a shipping confirmation or anything? I'm assuming mine will arrive sometime here...

Thanks,
Matthew