Some Good Mirc Sites to Get You Started

[bluetailfly3]

Omenscripts (http://www.omenscripts.org/index.html) are easy to use and install scripts to help you get and send files through mirc
Packetnews (http://www.packetnews.com/) is search engine to check irc channels for xdcc bots
Xgoogle (http://xgoogle.org/) another irc search engine
Invision (http://invision.lebyte.com/) another good script to help you out with sending and receiving files or just chat

This is definitely not an all inclusive list of what is available to use with mirc.These are just some of the more popular ones.

[Sockfulloflove]

Another really popular one is www.ircspy.com and www.xdccspy.com is alright.

[Cassavus]

Don't forget Packetseek. It's an IRC searching utility. http://www.packetseek.com

[blackspawn]

http://www.monkey-pirate.com/upp/index.php - another all around script

http://amip.tools-for.net/ - for showing off your playing songs ;)