Is the advice to not take out more than 5% for after tax savings still good?

I ask because someone said that the IRS limit for the B-fund (the max pay limit) went up, and I thought it might be possible to hit the 401k cap before you hit the salary cap if you are saving the 5%.

Since we don't get paid cash over cap, I don't want to cheat myself.

Also, is there a place to easily figure out how much the company has put into our B-fund year to date? It sure would be nice if it was listed on my pay stub.