SLR advice

[Admiral Huddy]

I've taken the plunge to SLR and got myself a Canon 400D which I saw as being an ideal camera to get me started. A local guy runs a photography club which I intend to take full advantage off and the local college runs various courses throughout the year which I may partake. I'm a complete novice to this but would like some advice on building a decent kit, particular on lenses. I'm thinking maybe a decent Telephoto and Macro lenses to get me going. I've got no idea what budget I need to set myself but hoping some of you gurus on here can help.

Thanks