Christian Science Monitor:

Tea Party-sponsored candidates could make it more difficult for Republicans as they — Ross Perot-like — split races as they target both "tax and spend" Democrats and those they like to call RINOs, or "Republicans-in-name-only."

Glenn Reynolds:

For the Republicans, the obvious solution is to run candidates who are less RINO-ish. For the Tea Party folks, the obvious solution is to push hard for their guys in primaries, then vote for whoever wins even if they have to hold their noses a bit sometimes. That’s politics.

Yes indeed, though if either group learns its lesson before the 2010 elections I'll be amazed.