[bluesman]

If I weigh out the pros and cons of it. I look at the cost, quality and effort (my time).

New Yeast

It's about $3/pk. cheap.  - Pro 

Virtually guarenteed to be viable - Pro

Almost no effort (sprinkle over wort) - Pro

vs.

Yeast Cake

Costs nothing - Pro

Health and Viability (OK if properly processed) - Pro ?

Effort required to harvest and properly store - Con

AFAIAC - it's hands down. Spend the $3 and RDWHAHB 

[Malticulous]

Well, considering it performs better (at least in my experience) on successive pitches , coupled with the fact that I have PLENTY of yeast for more beers I consider the effort of pouring the slurry into mason jars worth the effort.

It has to be poured out anyway right?  

I agree. The next generation makes better beer, plus I need to save every dollar I can. I'm not going to be pouring three bucks down the drain.