EVE Online, you aren't lacking for options. You can sign up for a monthly subscription, of course, but you can also purchase EVE time codes and PLEX. PLEX have the advantage of being tradeable within the in-game market, and you can use them to upgrade from a trial account to a full account. Or you can carry them around in a ship so that when it gets blown up, people can attach a real currency number to how much you lost.
Clearly, PLEX have more to offer, which is why EVE Online is phasing out EVE time codes in favor of PLEX activation codes. The net prices are identical, but the effect is that subscription time will be awarded as PLEX, which you can use in all of the many ways you already use PLEX. For more details and a quick rundown of how PLEX work, check out the official blog entry.
In other EVE news, CCP has released to its YouTube channel a Recording History video chronicling the events that triggered the Bloodbath of B-R5RB. We've included it below. [With thanks to tipster J!]