when at work, my iPhone 4 wirelessly syncs with my macbook pro, however at home, the two don't seem to find each other at all. Whether plugged in or not, it won't work at home. i have a linksys router if that helps
Is your macbook pro connected to the internet? Like me, I have heard of a lot of other people reporting wifi issues with Lion. See this to find out about what I mean. https://forums.macrumors.com/threads/1192126/
It also leads to me not being able to see/access shared folders on this Lion computer or to use screen sharing using my Macbook Pro on the same wifi network.