The rinkeby faucet only seems to have an option for ether. I'd like some weth so I can test Uniswap v2. Anyone know where I can get some? Thanks!
Normal way would be as described by @Morten. Alternatively just purchase WETH with ETH at https://app.uniswap.org/#/swap.
Before you do the swap ETH -> WETH, you cannot make the mistake of entering just "WETH". Some (scam?) coin called weth (whose logo is depicted below) will appar, but that is not the real WETH. Any funds sent there will be lost forever and not be returned as the WETH funds you want. Be sure to add the real WETH to your Metamask by searching for its address, as mentioned here before: 0xc778417E063141139Fce010982780140Aa0cD5Ab