de novo small RNA transcriptome assembly for non-model species?

Question

What are the recommended tools for de novo assembly of Illumina sequencing of small RNAs (like miRNAs, snoRNAs, etc) of a read length of 36bp for a eukaryote multicellular species without a reference genome?

I tried the latest version of Trinity with default parameters on the public dataset from the SRA:

http://www.ncbi.nlm.nih.gov/sra?term=SRR057742

And it only gives me 1 transcript back:

~/trinityrnaseq_r2012-01-25/Trinity.pl --kmer_method meryl \
--seqType fq --single SRR057742.fastq --CPU 1

>comp1_c0_seq1 len=206 path=[1:0-205]
AAGCAGAAGACGGCATACGACCAAGGCCTCTAGTCATTCGCTTTACCGGATAAAACTGCT
CAGCGAGCGCCAGCTATCCTGAGGGAAACTTCGGAGGGAACCAGCTACTAGATGGTTCGA
TTAGTCTTTCGCCCCTATACCCAGGTCGGACGACCGATTTGCACGTCAGGACCGCTGCGG
GCCTCCACCAGAGTTTCCCCTGGCTT

Any ideas what I can try?