Bmesh Introduction
After several years of developement, finally we have Bmesh into an official stable release (2.63). Bmesh is the new Blender's modeling system. Apparently, we're going to see little differences, but there are a lot of changes, as the core has been rewritten! Until now, Blender had only support for triangles and four-sided polygons. This ain't that way anymore, now we have n-gons fully supported :) This "little" change, allows us to rething our modeling workflows, as now we don't need to clean anymore triangles and automatic cuts generated when we subdivided a face or an edge, for example. New tools using this feature have been also brought to life, like dissolve, which let us convert a group of faces in just an n-gon, and redraw topology on top of that. Some more tools like bevel and bridge are here, and knife tool has been revamped. We're going to see all of this, and also the Mesh Lint addon, that will let us know how many (and most important: where) our mesh has problems like triangles, n-gons or whatever :)
Watch this tutorial on YouTube
I hope you understood the possibilities of Bmesh and the use of n-gons during the modeling process. BUT! Keep your final models clean! This means, no ngons, no triangles (some hidden ones aren't really bad at all, but keep the hidden, as they are able to mess with the subdivisions when you use the subsurf modifier hehe)... four-sided polygons is the way to go, n-gons are another tool that helps us during the process for achieving that goal :) See you!

Comments
Excelent this tutorial.
Hola excelente tutorial como te dije Oliver, respecto al vertex slide mi duda es si se podrían deslizar varios vertices individuales a la vez por sus aristas como sucede con la opción de constraint en edit geometry de 3dmax, si no se puede me imagino que lo implementarán en un futuro.
Saludos Alex
Hola Alex, pues sinceramente no estoy seguro ahora mismo de si se puede, pero me suena que no jeje. Sí, estaría bien que lo implementaran :)
Hmmm I don't get your issue. Seeing what you're doing would be simpler for me to understand what the problem can be :P If you want you can send a few images or video to my email through the contact tab ;)
Hi, fourdegrees :) Thanks a lot for your comment!! I'm very glad you like the tutorials and you're learning from them. Good luck with Blender! It's a great piece of software :D
I think you found the solution :P