The freeware version of Eagle will probably suffice for now.
www.cadsoftusa.com and browse around.  Be warned that while it is a good
program and can do most basic things, its libraries are a bit screwy and
sometimes inconsistent.

Olin Lathrop has a nicely done set of custom libraries somewhere in his
www.embedinc.com web space.  He will no doubt chime in soon with a link.

That said, you could also consider www.pcb123.com which is owned by
Sunstone circuits (www.sunstone.com).  They also own www.pcbexpress.com
and www.pcbpro.com.  For quick, one-off stuff they are pretty
reasonable.  PCB123 has downloadable software that lets you do simple
schematics and layouts.  

Another consideration might be gEDA at www.geda.seul.org.  Haven't
looked at it in several years.

Rob

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