Here’s an interesting blog post from Pete Basofin at the Sacramento Bee. It was written shortly before Sen. Ted Kennedy died but is still relevant. There’s a list of the longest serving Senators.
There’s also a list of how many senators have died in office since the beginning of this country’s founding. To get that list, you have to link to Political Graveyard, which is worth linking here. It’s a large biographical database of living and dead politicians.