I ran across this and decided to give it a shot. A fan made continuation of TOS, picking up in year four of the original five year mission. Right now it looks like there are 8 episodes and I've watched the first three and it is actually some pretty good stuff, I'm wicked surprised. Guests so far are Walter Koenig in episode 2 (written by D.C. Fontana) and George Takei in episode 3. The sets are spot on, they steal all of the original sound effect and they even throw in some not terrible special effects. I thought #1 was mediocre at best, they tried to throw in too much crap as shout outs to TOS. #2 is much better, even though it also is almost a continuation of The Deadly Years, some great dialog between Chekov and himself :D #3 is down right awesome with Sulu getting sort of lost for 30 years and returning with a daughter, then... Well, you should watch it.
I'm not sure if this link brings you directly to episode one or three... but you can select on the left which episode to watch.
http://digitalnewage.com/dnapartners/stp2/default.asp?epi=IHW