Interesting thought on the ccna? It seems like a lot of smaller businesses force the system admin to run the cisco phones and do basic router/switch setup too so they seem to list it. I guess I'll evaluate that more and put it more on the back end since it seems the most time consuming and less of what I want to do.
Alex, many a time, those job listings are done by HR people who are what we'd consider "technically challenged". The CCNA is still a marketable cert to a company that runs Cisco gear. If they don't then it'll still show you have a damn solid knowledge of networking. The Net+ is easy. 7 layers, TCP vs UDP, topologies, ports, and that's is. The CCNA material I studied was way, way more in depth than the Network+ material.
If you ask me (and you're not, but I'm stating my view either way), the Network+ is good but the CCNA will look better to anyone that knows the difference between the two.
As for learning SQL and such, every SysAdmin I've met or worked with is also part programmer. Knowing SQL and such wouldn't be a bad thing but you don't have to get a cert in everything. Just don't use the word "dabble" on your resume.