(Mac OSX, Illustrator CS5)
When moving objects around the pasteboard, what's the voodoo magic trick to get Illustrator to snap to guides? I can't seem to find a setting for this anywhere. Surely you can snap to guides with Illustrator, can't you?
Turn on Smart guides. And set the preferences for them (check "transform tools")
Illustrator snaps to the cursor position
And bear in mind that – specifically at different zoom levels – AI's snapping capabilities are incredibly unreliable and imprecise.