Is there a simple telnet command line utility for Windows 7? I am used to the telnet command that is built into UNIX, but I can't seem to find one for Windows that can be used similarly.
The Telnet client in Windows 7 is disabled by default, and needs to be enabled via Windows' Programs and Features:
Control Panel --> Programs --> Turn Windows features on or off, in the dialog that pops up check-mark "Telnet Client".
For more info see: Why isn't Telnet enabled by default in Windows 7?
And at MS's site you can check out Telnet: frequently asked questions.
A much better (and FOSS) Telnet client is PuTTY.
If you need to connect using telnet from the command line, take a look at Plink. Its by the same people that make PuTTY. Plink allows you to script connections to anything PuTTY can connect to. I used plink with simple batch files and perl files on windows with fairly good results (of course you results may vary). If you are just looking to get a telnet connection from command line then the vanilla telnet client in Windows should be okay.