Video on making an L shaped rip fence for your band saw.
I had this posted in general might be more useful here.
http://www.woodsmithtips.com/2011/04/21/auxiliary-fence/
Thanks David. That is a good tip.
Interesting, I’ve been thinking of either a small band saw or a small table saw and wondered about making straight cuts.
Table saw first. It’s more useful.
John L,
Couldn’t agree more with the following caveat … table saws make a MUCH larger pile of waste. Sometimes the blade leaves more on the floor than the piece being cut. 
Bob C.
Nice tip Thank you David
I bought an inexpensive bar clamp from Harbor Freight to clamp to my bandsaw table for a guide. Seems to work OK for me.
This is the band saw rip fence I use.
Go to page 8 to see the two positions the fence can use set to easily.
http://www.kregtool.com/prodimages/kms7200%20%20band%20saw%20fence%20manual.pdf
Kind of one of those “duh” moments. It makes prefect sense as to why the blade wanders when you are cutting small dimensions.
Here is the fence I use on my band saw
http://www.carterproducts.com/product.asp?product_id=474&cat_id=75
Works great.