BytaFont
We've already written briefly about BytaFont as an up and coming replacement for those of you frustrated by FontSwap's lack of support for the current iOS (as of 4.2.1), but now that I've had ample time to take it for a spin, I felt it time to share my experience with you.
For starters, I've never felt the need to change the system font, at least until I did it, at which point I stumbled upon the myriad of stellar font options available via Cydia. From there, I was hooked, and I've been messing with fonts ever since.
BytaFont makes swapping fonts a snap, though I was frustrated that it shipped with just a single default font. However, the time it took from finding and downloading an additional font, to having it fully installed was less than 3 minutes, so all in all, I'm a happy camper.
To install a font, simply visit the fonts repo in the Cydia packages menu, click, install, and run. From there, open up BytaFont on your Springboard and select the new font to implement. Re-spring and you're done. It's as easy as that.
As I mentioned earlier, swapping fonts is hardly an essential item for iPhone users, but it is convenient, and makes my phone feel like mine, rather than a piece right out of the box. It's also free, so there's really nothing to complain about here.
Though they did have a few crashing issues in their initial version, they appear to have resolved them in 1.1, while also giving you the option to retain default fonts when and where you need or prefer to.
Overall, I haven't had a single issue with this app, nor any of the fonts, and I'm 100% happy with the result. It's fast, it looks as good as it can, and it's convenient. Best of all, they're keeping users updated via the product blog here.