Do you ever get tunnel vision? Apparently I do. And I did when I wrote Convert Questions: Converts and Aliyah.
Let's summarize that post quickly: There are two times where your "Jewish" status matters when making aliyah to Israel: (1) for the Rabbinate (orthodox converts only, and even then it's not a given) and (2) the Ministry of the Interior, who decides who gets to become an Israeli citizen. The paradox I noted before was that the Rabbinate could think you're the frummest Yid since Moshe Rabbenu, but still not qualify as a Jew for purposes of the Law of Return. The Ministry of the Interior has unreleased (and sometimes changing) internal regulations that could prevent a convert from making aliyah because of an uncorrectable "flaw" in their conversion. As of right now, the policies in place require 1 year of residence in the converting community AFTER the conversion is complete. (I've also seen 9 months. Note that this policy was declared an unconstitutional violation of the Law of Return by the Israeli Supreme Court, so the Ministry of the Interior just started secretly enforcing this regulation.) This is bad if you converted 5, 10, or 20 years ago and moved to a new community within that year. You just can't fix that. Similarly, they're requiring a certain amount of study time as part of the conversion process (I've seen 350 hours), which is also something that can't be "corrected" later.
If you're like me and have no familial Jewish connections, that post is still true. However, the very clever Ronit reminded me to look at the other provisions of the Law of Return. (That's the law that allows Jews from anywhere in the world to immigrate to Israel with automatic citizenship.)
The Law of Return defines "Jew" (ironically enough) according to the same criteria used by the Nazis in their Nuremberg Laws: Anyone with one Jewish grandparent or who has a spouse with at least one Jewish grandparent. (Note that any halachic Jew who "voluntarily changed his religion" is ineligible for citizenship under the Law of Return. That includes Messianic Jews, but not Messianic Jews without a Jewish mother.) With all that in mind, let's look at some possible situations that can still get you converts back to the Land of Milk and Honey!
a) You get married to a Jew! You were going to do that anyway, right? If you got married (or were married before your conversion) to a Jew of any stream, you can make aliyah as a Jew, all internal regulations aside! No needing to wait a year, and no worrying about the hours requirement. Like you really needed the state of Israel to jump on the "What, you're 22? Get married and have babies already!" bandwagon.
b) You have a father or at least one grandparent who is Jewish. Proving that can get tricky, though. However, people do it all the time, so it can be done.
Basically, when do these regulations matter? When you're single and don't have Jewish family. AKA, this girl over here. Hence...tunnel vision. I apologize if I caused you any unnecessary fear, and may we all merit to live in the land!