PHP

features: isn't microsoft, is open source, totally free, alot more popular than ASP, older than ASP (afaik), isn't by M$ so won't be totally changed by next year!

disadvantages: if you're setting up the computer to serve it, you have to have a tiny bit of clue

asp, um, copy above, and reverse!

features: if you're setting up the computer to serve it, you don't need any intelligence to set it up etc.!