I use one of these ...
http://youtube.com/watch?v=xFxuooOKe4o.... for whole hops. Takes 2 minutes to make and it doesn't really constrict the movement of the hops through the wort.
Pellet hops I just toss in and suck em up along with everything else through the racking cane. It's so much simpler to clear that mess out in the secondary. Whole hops on the other hand gobble up wort and clog everything up.