The ST-E2 is strictly line of sight, and does not always work well out of doors. I find it quite useful indoors - the IR can reflect from the walls to the flash, but out of doors people do complain about it not working well.
I sometimes use my hand or a white card as a reflector in front of the ST-E2 to direct the IR beam towards the receiving flash when out of doors. Or use an off camera OC3 cord to direct the ST-E2 beam at the receiving slav flash. The range of the ST-E2 out of doors may be less than 15 feet at times, and sometimes far less than that.
The Pocket Wizard MiniTT1 and the associated Flex TT5 will be significantly more reliable in sunlight out of doors, with almost unlimited range.
I have ended up owning both systems, and like the simplicity of the ST-E2 when it works ( and indoors in a home/candid setting it never has failed me) but out of doors can be more problematic. If I had to depend on off camera ETTL out of doors for my living, I would strongly favor the
PWs MiniTT1 and the FLex TT5. They will work reliably, but are more complex, demanding to set up, and more expensive. But they do work well.
Using straight PWIIs ( non ETTL ) and manual flash is another alternative to consider of course.
You can just use the 580exII as the master and your 430exII as your slave, of course.
Does the 60D incorporate the wireless control for EOS system flash? - I know the 7D certainly does.
Yes, according to dpreview, the 60D does include wireless speedlight control -
http://www.dpreview.com/previews/canoneos60d/