There really should just be one. If miners find the variance too high they can use a different pool, or maybe someone sets up a proxypool for vertcoin. I ported the proxypool project (from doge.st) to vertcoin but haven't had time to try setting up a payment back end/etc. I believe on saw on chat someone had done so but if they haven't publicly announced it here, I'll leave it to them to do so.

Edit: bengt said open the flood gates, http://p2proxy.net/ . If you want to mine on a pool that shares hash rate with the p2pool network but not run p2pool itself because of variance, then give that a try!