I also use yeastcalc.com for figuring out my starter sizes. I like it better than the mr. malty site/tool since you can do up to three starter steps on the yeastcalc tool. The Wyeast tool is difficult since it doesn't allow you to set the starter sizes. It assumes the second step is the batch of beer you're making, which is not always the case.
I used the yeastcalc tool to get the three starter steps I needed to use 10 month old tubes (two of them) of WLP099 for the barleywine I'm fermenting. Got the cell count needed to pitch pretty easily. Also did it with just one 3L flask (increasing starter size each time). I'm often making two step starters when using older yeast. It's easier to do that, using less DME, than going for a single larger starter.
BTW, do you have a stirplate? That also allows you to make smaller starters that are finished far sooner.