In episode "200" of SG-1, Vala says about Sci-Fi programs on TV:
... and apart from one glaring omission, it doesn't seem to be that bad.
What is that glaring omission?
The script for "200":
Um, I've been looking at this, and there doesn't seem to be any mention of a sexy female alien… anywhere! I'm not even in this!
[Carter shoots Vala a disbelieving look. Daniel casts a side long glance at Vala and sighs.]
You know, the really unbelievable part is that anyone would consider spending millions of dollars on this. I mean, seriously, all these writers, and they couldn't come up with anything better?
I don't know, I've been watching a lot of television lately, and apart from one glaring omission, it doesn't seem to be that bad.
I think it's pretty obvious that she is talking about the movie script, and only referring to the other sci-fi as a reference to compare the script again. So, the glaring omission is the "sexy female alien" - or, rather, Vala herself.
To parse the script: Carter says the script is bad - Vala says the script isn't that bad compared to what else she's seen on TV, except for...
I always assumed, considering she is reading the "Wormhole eXtreme" script, she was talking about herself, or rather her expy; being the latest addition to the team, I assumed Martin hadn't included her yet.
It's not explicitly stated, but it's fairly obvious she's referring to Stargate: SG-1 itself. The vast majority of that episode is one great big in-joke. This is similar to the MacGyver reference in the pilot.