I have to admit I have resisted ordering fabric online mainly because I'm impatient, but also because I find the colors are hard to read on screen. However, there are a number of online sources that are very tempting. Here's my current fantasy shopping list:
Garden Party at Sew Mama Sew
Marimekko prints (reasonably priced!) at The Fabric Fairy
What's Buzzin' Cuzzin ? at Cicada Studio
Modern Flora at J. Caroline Creative
Japanese Imports at Repro Depot
Alas, I think any actual shopping will have to wait until I finish at least one item on my current project list.