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Many people are building machines they designed from scratch. Here is combination of CNC machine and 3d printer which is well documented with complete build guide. It has some interesting features like printing with many materials.

Here is 2BEIGH3 as CNC cutter slicing trough acrylic plate:



Here is 2BEIGH3 3d printing with Nylon (btw: printing Nylon emits toxic fumes, it should be done in controlled environment):

2BEIGH3 technical specifications:

• Build volume for CNCing: 14” x 14” x 6”,  355mm x 355mm x 160mm  
• Build volume for 3d printing: 14” x 14” x 12”, 355mm x 355mm x 355mm
• Material Aluminium 3mm or 0.125" ABS and PLA Plastic Rod or Line
• Plastics 2-3mm(or 0.125") Nylon, Nylon Polymers, Nylon 6 and 6/6 - 6' Rod
• Foam 3mm or 0.125" PET (Plastic from water bottles)
• (Steel with the addition of cooling) 
• Resolution: X-Y Resolution +/- 0.005 ~ +/- 0.012, Z Resolution +/- 0.005 +/- 0.005
• Cut/Print Speed 350mm/min 24mm/s
• Cutting Foam ABS
• Tools/Tips 0.125” – 0.250” .32mm - .62mm

Software:

• Any CAD that makes “.dxf” and exports “.stl”
• MACH3
• LazyCam slic3r rev 6
• PC Win XP

This hybrid can print with various materials like ABS, PLA, different nylon polymers, acrylic and It can also print with reclaimed PET from the regular PET bottles. Here are the images of printed objects in different materials:



Here is a video of it printing in clear acrylic:





Hot end is also custom designed from simple parts:



























All the details need for construction of 2BEIGH3 can be found here:

http://www.instructables.com/id/Combination-CNC-Machine-and-3D-Printer/?ALLSTEPS

Ultra Tough FDM Nylon12 video presentation 

Low Orbit Helium Assisted Navigator's (LOHAN) Vulture 2 rocket powered spaceplane is near space aircraft lifted by helium balloon into high atmosphere. After release this 3d printed GPS guided spaceplane flies and lands powered by rocket engine to predesignated spot. Now, how cool is that?

Project and spaceplane  presentation:




Prototype test flight:

LOHAN Vulture 2 3d printed spaceplane

LOHAN Vulture 2 coverage: http://www.theregister.co.uk/Wrap/lohan/

LOHAN Flickr photo stream: http://www.flickr.com/photos/registerparis/

LOHAN Vulture 2 mission summary:



They explored SLS 3d printing as production method and they made a video with SULSA from Suothampton University:



Here is first post on Southampton Uni 3d printed SULSA airplane:

http://diy3dprinting.blogspot.com/2011/11/3d-printed-aircraft-from-university-of.html


Also, do keep in mind students who developed and successfully tested 3d printed metal rocket engine:

http://diy3dprinting.blogspot.com/2013/10/students-developed-and-successfully.html

Future of space exploration is DIY and 3d printed.

There are more filaments from various materials available for 3d printing then just simple PLA and ABS. Here are some links on news related to filaments ...

Excellent roundup post by NothingLabs on various filaments, how to print with them and their properties:

http://nothinglabs.blogspot.com/2013/09/filament-roundup-3d-printing-in-all.html

Here is his detailed presentation from google docs: http://tinyurl.com/kq3sbjd

Color changing and magnetic metal infused 3d printing filaments 

http://printm3d.com/filaments/

New flexible material - Filaflex

http://recreus.com/

Hackaday video from Maker Faire 2013:

Extensive test of soft PLA (FlexPLA):

http://algorithmicart.wordpress.com/2013/08/22/3d-printing-with-flexible-materials-flexpla-tests/

Petleh82 improved his Ultimaker. He added cheap Bluetooth module to enable wireless printing. He also stopped using blue tape on printbed and replaced it it with glass. To get PLA to stick to the glass print surface he coated it in mixture of wood glue and water. He successfully printed with nylon on glaass since it has problems sticking and warping on blue tape. Nice projects Petleh!





Check out previous post with a video on his one year with the 3d printer. He really shows how printers are useful and fun in everyday life:

http://diy3dprinting.blogspot.com/2013/03/petleh82-on-one-year-owning-3d-printer.html