Craiglist, query and response project

I have a project that I have decided to embark on . Basically is goes like this; Everyday there are listing for work on Craiglists that one can see under computers gigs. I want to right a program that will check Craiglists --> GIGs --> Computers and search for certain key words that I specify like {WAN, LINUX, CABLING} under each daily posting and then reply with a customized e-mail depending on the query results. Where would I begin? Is this legal?

You would start with wget

Wget - Links

Sorry, no one on these forums can offer you legal advice.

Please consult your attorney for legal matters.

can wget query a webpage?